Image Thumbnails and videos are not showing up on nextcloud

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Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can :heart:

Docker Nextcloud version (eg, 20.0.5): 22.2
Operating system and version (eg, Ubuntu 20.04): Ubuntu 20.04

I use This docker compose file

The issue you are facing:

Preview of images(.jpg) are not shown in photos app.

image

Videos(.mp4) plays on nextcloud but shows black screen only audio plays.

Is this the first time you’ve seen this error? (Y/N): Y

Steps to replicate it:

  1. upload .jpg files to nextcloud and stop the docker container
  2. run python script to compress image files
  3. start the docker services

Things I have tried:-

  1. docker-compose -u www-data app php occ files:scan --all
  2. docker-compose -u www-data app php occ preview:repair
  3. docker-compose -u www-data app php occ maintenance:data-fingerprint 4. docker-compose -u www-data app php occ maintenance:mimetype
  4. docker-compose -u www-data app php occ maintenance:mimetype
  5. docker-compose -u www-data app php occ maintenance:repair
  6. docker-compose -u www-data app php occ files:cleanup
  7. docker-compose -u www-data app php occ files:repair-tree
  8. docker-compose -u www-data app php occ files:scan-app-data

The output of your Nextcloud log in Admin > Logging:

Nothing comes in log file

but this image show that preview requests are failing.

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

{
    "system": {
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "domain.com"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "22.2.0.2",
        "overwrite.cli.url": "http:\/\/domain.com",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mail_smtpmode": "smtp",
        "mail_smtpsecure": "tls",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "loglevel": "2",
        "maintenance": false
    },
    "apps": {
        "accessibility": {
            "enabled": "yes",
            "installed_version": "1.8.0",
            "types": ""
        },
        "activity": {
            "enabled": "yes",
            "installed_version": "2.15.0",
            "notify_email_calendar": "0",
            "notify_email_calendar_event": "0",
            "notify_email_calendar_todo": "0",
            "notify_email_comments": "0",
            "notify_email_contacts": "0",
            "notify_email_favorite": "0",
            "notify_email_file_changed": "0",
            "notify_email_group_settings": "1",
            "notify_email_public_links": "0",
            "notify_email_remote_share": "0",
            "notify_email_shared": "0",
            "notify_email_spreed": "1",
            "notify_email_systemtags": "0",
            "notify_notification_calendar": "0",
            "notify_notification_calendar_event": "0",
            "notify_notification_calendar_todo": "0",
            "notify_notification_comments": "0",
            "notify_notification_contacts": "0",
            "notify_notification_favorite": "0",
            "notify_notification_file_changed": "0",
            "notify_notification_file_favorite_changed": "0",
            "notify_notification_group_settings": "0",
            "notify_notification_personal_settings": "0",
            "notify_notification_public_links": "1",
            "notify_notification_remote_share": "0",
            "notify_notification_security": "1",
            "notify_notification_shared": "0",
            "notify_notification_spreed": "1",
            "notify_notification_systemtags": "0",
            "notify_setting_batchtime": "3600",
            "notify_setting_self": "0",
            "notify_setting_selfemail": "0",
            "types": "filesystem"
        },
        "admin_audit": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "logging"
        },
        "analytics": {
            "enabled": "no",
            "installed_version": "3.6.1",
            "types": ""
        },
        "backgroundjob": {
            "lastjob": "1013"
        },
        "bruteForce": {
            "whitelist_1": "127.0.0.1\/24"
        },
        "bruteforcesettings": {
            "enabled": "yes",
            "installed_version": "2.2.0",
            "types": ""
        },
        "calendar": {
            "enabled": "yes",
            "installed_version": "2.3.4",
            "types": ""
        },
        "circles": {
            "enabled": "yes",
            "installed_version": "22.1.1",
            "loopback_tmp_scheme": "http",
            "maintenance_run": "0",
            "maintenance_update": "{\"maximum\":3,\"3\":1636456800,\"2\":1636458001,\"1\":1636458001,\"4\":1636423200,\"5\":1636340400}",
            "migration_22": "1",
            "migration_22_1": "1",
            "migration_run": "0",
            "types": "filesystem,dav"
        },
        "cloud_federation_api": {
            "enabled": "yes",
            "installed_version": "1.5.0",
            "types": "filesystem"
        },
        "comments": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "logging"
        },
        "contacts": {
            "enabled": "yes",
            "installed_version": "4.0.6",
            "types": "dav"
        },
        "contactsinteraction": {
            "enabled": "yes",
            "installed_version": "1.3.0",
            "types": "dav"
        },
        "core": {
            "backgroundjobs_mode": "cron",
            "installed.bundles": "[\"CoreBundle\"]",
            "installedat": "1636311367.1481",
            "lastcron": "1636458001",
            "lastupdateResult": "[]",
            "lastupdatedat": "1636451442",
            "moveavatarsdone": "yes",
            "oc.integritycheck.checker": "[]",
            "previewsCleanedUp": "1",
            "public_files": "files_sharing\/public.php",
            "public_webdav": "dav\/appinfo\/v1\/publicwebdav.php",
            "shareapi_enforce_links_password": "no",
            "theming.variables": "b92d206521717ac032f8aa58d3c7ff2f",
            "vendor": "nextcloud"
        },
        "dashboard": {
            "enabled": "yes",
            "installed_version": "7.2.0",
            "types": ""
        },
        "dav": {
            "buildCalendarReminderIndex": "yes",
            "buildCalendarSearchIndex": "yes",
            "enabled": "yes",
            "installed_version": "1.19.0",
            "regeneratedBirthdayCalendarsForYearFix": "yes",
            "types": "filesystem"
        },
        "duplicatefinder": {
            "enabled": "no",
            "installed_version": "0.0.12",
            "types": ""
        },
        "federatedfilesharing": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": ""
        },
        "federation": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "authentication"
        },
        "files": {
            "enabled": "yes",
            "installed_version": "1.17.0",
            "types": "filesystem"
        },
        "files_markdown": {
            "enabled": "yes",
            "installed_version": "2.3.4",
            "types": ""
        },
        "files_pdfviewer": {
            "enabled": "yes",
            "installed_version": "2.3.0",
            "types": ""
        },
        "files_rightclick": {
            "enabled": "yes",
            "installed_version": "1.1.0",
            "types": ""
        },
        "files_sharing": {
            "enabled": "yes",
            "installed_version": "1.14.0",
            "types": "filesystem"
        },
        "files_trashbin": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "filesystem,dav"
        },
        "files_versions": {
            "enabled": "yes",
            "installed_version": "1.15.0",
            "types": "filesystem,dav"
        },
        "files_videoplayer": {
            "enabled": "yes",
            "installed_version": "1.11.0",
            "types": ""
        },
        "fileslibreofficeedit": {
            "enabled": "yes",
            "installed_version": "1.0.2",
            "types": ""
        },
        "firstrunwizard": {
            "enabled": "yes",
            "installed_version": "2.11.0",
            "types": "logging"
        },
        "logreader": {
            "enabled": "yes",
            "installed_version": "2.7.0",
            "types": ""
        },
        "lookup_server_connector": {
            "enabled": "yes",
            "installed_version": "1.10.0",
            "types": "authentication"
        },
        "mail": {
            "enabled": "no",
            "installed_version": "1.10.5",
            "types": ""
        },
        "maps": {
            "enabled": "yes",
            "installed_version": "0.1.9",
            "lastAddressLookup": "1636453202",
            "types": "filesystem"
        },
        "metadata": {
            "enabled": "yes",
            "installed_version": "0.14.0",
            "types": ""
        },
        "music": {
            "enabled": "yes",
            "installed_version": "1.4.1",
            "types": "filesystem"
        },
        "news": {
            "enabled": "yes",
            "installed_version": "16.2.0",
            "types": ""
        },
        "nextcloud_announcements": {
            "enabled": "yes",
            "installed_version": "1.11.0",
            "pub_date": "Thu, 24 Oct 2019 00:00:00 +0200",
            "types": "logging"
        },
        "notifications": {
            "enabled": "yes",
            "installed_version": "2.10.1",
            "types": "logging"
        },
        "oauth2": {
            "enabled": "yes",
            "installed_version": "1.10.0",
            "types": "authentication"
        },
        "password_policy": {
            "enabled": "yes",
            "enforceNumericCharacters": "1",
            "enforceUpperLowerCase": "1",
            "expiration": "180",
            "installed_version": "1.12.0",
            "maximumLoginAttempts": "0",
            "types": "authentication"
        },
        "phonetrack": {
            "enabled": "yes",
            "installed_version": "0.6.9",
            "types": ""
        },
        "photos": {
            "enabled": "yes",
            "installed_version": "1.4.0",
            "types": ""
        },
        "privacy": {
            "enabled": "yes",
            "installed_version": "1.6.0",
            "types": ""
        },
        "provisioning_api": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "prevent_group_restriction"
        },
        "recommendations": {
            "enabled": "yes",
            "installed_version": "1.1.0",
            "types": ""
        },
        "richdocuments": {
            "disable_certificate_verification": "yes",
            "enabled": "yes",
            "installed_version": "4.2.3",
            "types": "prevent_group_restriction",
            "wopi_url": "http:\/\/domain.com\/custom_apps\/richdocumentscode\/proxy.php?req="
        },
        "richdocumentscode": {
            "enabled": "yes",
            "installed_version": "6.4.1303",
            "types": ""
        },
        "serverinfo": {
            "cached_count_filecache": "20957",
            "cached_count_storages": "4",
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": ""
        },
        "settings": {
            "enabled": "yes",
            "installed_version": "1.4.0",
            "types": ""
        },
        "sharebymail": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "filesystem"
        },
        "socialsharing_email": {
            "enabled": "no",
            "installed_version": "2.3.0",
            "types": ""
        },
        "spreed": {
            "enabled": "no",
            "has_reference_id": "yes",
            "installed_version": "12.1.2",
            "types": "dav,prevent_group_restriction"
        },
        "support": {
            "SwitchUpdaterServerHasRun": "yes",
            "enabled": "yes",
            "installed_version": "1.5.0",
            "types": "session"
        },
        "systemtags": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "logging"
        },
        "text": {
            "enabled": "yes",
            "installed_version": "3.3.0",
            "types": "dav"
        },
        "theming": {
            "enabled": "yes",
            "installed_version": "1.13.0",
            "types": "logging"
        },
        "twofactor_backupcodes": {
            "enabled": "yes",
            "installed_version": "1.11.0",
            "types": ""
        },
        "twofactor_totp": {
            "enabled": "yes",
            "installed_version": "6.1.0",
            "types": ""
        },
        "unsplash": {
            "enabled": "yes",
            "installed_version": "1.2.3",
            "types": ""
        },
        "updatenotification": {
            "enabled": "yes",
            "installed_version": "1.12.0",
            "types": "",
            "update_check_errors": "0"
        },
        "user_ldap": {
            "enabled": "no",
            "installed_version": "1.12.0",
            "types": "authentication"
        },
        "user_status": {
            "enabled": "yes",
            "installed_version": "1.2.0",
            "types": ""
        },
        "viewer": {
            "enabled": "yes",
            "installed_version": "1.6.0",
            "types": ""
        },
        "weather_status": {
            "enabled": "no",
            "installed_version": "1.2.0",
            "types": ""
        },
        "workflow_media_converter": {
            "enabled": "yes",
            "installed_version": "1.2.20",
            "types": ""
        },
        "workflowengine": {
            "enabled": "yes",
            "installed_version": "2.4.0",
            "types": "filesystem"
        }
    }
}

The output of your Apache/nginx/system log in /var/log/____:

dockernextcloud-app-1  | 2021-11-09T11:51:13.216530446Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14928&x=256&y=256&a=true&v="35f093a244381814a3352d446765f028" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.244247289Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=13813&x=256&y=256&a=true&v="ab1f6ca29f082165084a4ba483747d5b" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.310999804Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14232&x=256&y=256&a=true&v="3615f75b57a883343d0712c0b6129fe6" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.341119273Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14214&x=256&y=256&a=true&v="e1a3f99432306689584112825e474a09" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.382434350Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=13829&x=256&y=256&a=true&v="4e6d4d808e43057be7a3f0cacfd452bb" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.418649001Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=3879&x=256&y=256&a=true&v="dacf111dfd6352bacda6316118949022" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.462968361Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14002&x=256&y=256&a=true&v="9a2b8db7ac617c251f14cf4fb05311e8" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.667636579Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=571&x=256&y=256&a=true&v="16017a3de28dd2528720a817c5130e37" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.730107257Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14858&x=256&y=256&a=true&v="84d78254c75f00b789eac5ca7c6a9295" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.770340710Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14349&x=256&y=256&a=true&v="c03e2da48cc1c36a00f0c54c7323c698" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:13.938829633Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14549&x=256&y=256&a=true&v="79cf0ebd824aa6d072447b6b5ed4cf7e" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.026671084Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14532&x=256&y=256&a=true&v="e1281deb6709ce6d115b0b4b54745700" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.063476419Z 32.105.85.119 - - [09/Nov/2021:11:51:13 +0000] "GET /core/preview?fileId=14510&x=256&y=256&a=true&v="2c227624dfd3e1813c287c6a6e123552" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.218879297Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14430&x=256&y=256&a=true&v="3c5abc95ad44ae0f84cae65e303c0174" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.307860480Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14492&x=256&y=256&a=true&v="c6ad4c981565bb9a8ed82817f5fa554d" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.339229970Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14303&x=256&y=256&a=true&v="e03ac9ba68646f70af748ab601213b01" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.481443677Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14328&x=256&y=256&a=true&v="6e8a694bd6e5f478441ba17a4b5e114a" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.584793839Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14368&x=256&y=256&a=true&v="cd785b6f8abd1c7104f27f1d5eebb10d" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.626550394Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14255&x=256&y=256&a=true&v="a546883a514641c1faadef2cae72ec10" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.755759199Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14295&x=256&y=256&a=true&v="7dec0c032b8aed27ad17ea3b044edd9f" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.857830617Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14191&x=256&y=256&a=true&v="ffc5212e15d01bd9c0213d83d6a573b6" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:14.908533797Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14054&x=256&y=256&a=true&v="5e050e773ee662eaf31db0e6cd280d77" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.024943635Z 32.105.85.119 - - [09/Nov/2021:11:51:14 +0000] "GET /core/preview?fileId=14241&x=256&y=256&a=true&v="108ca4e2eed3127453e0ed445d78a0c0" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.133354870Z 32.105.85.119 - - [09/Nov/2021:11:51:15 +0000] "GET /core/preview?fileId=14042&x=256&y=256&a=true&v="322b62d9cfab7035cb46085e57c5aba8" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.182946210Z 32.105.85.119 - - [09/Nov/2021:11:51:15 +0000] "GET /core/preview?fileId=13948&x=256&y=256&a=true&v="ce76c41e9f008b88d78bc0513e1848ea" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.294751538Z 32.105.85.119 - - [09/Nov/2021:11:51:15 +0000] "GET /core/preview?fileId=14340&x=256&y=256&a=true&v="c4389c85dc5a63b592ac0a825ddb8085" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.417902223Z 32.105.85.119 - - [09/Nov/2021:11:51:15 +0000] "GET /core/preview?fileId=13787&x=256&y=256&a=true&v="c83b5187e306529e9bce759583ef6bcf" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.468244609Z 32.105.85.119 - - [09/Nov/2021:11:51:15 +0000] "GET /core/preview?fileId=13866&x=256&y=256&a=true&v="f871e4e4737cce1ed9390c785cc3f5a7" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.567485368Z 32.105.85.119 - - [09/Nov/2021:11:51:15 +0000] "GET /core/preview?fileId=3977&x=256&y=256&a=true&v="f59661d25f070e82e93118baeb5e6d59" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.700600426Z 32.105.85.119 - - [09/Nov/2021:11:51:15 +0000] "GET /core/preview?fileId=13777&x=256&y=256&a=true&v="5f8ffd676da273cb5ec5af344af4f275" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.760818648Z 32.105.85.119 - - [09/Nov/2021:11:51:15 +0000] "GET /core/preview?fileId=14928&x=256&y=256&a=true&v="35f093a244381814a3352d446765f028" HTTP/1.1" 404 753 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:15.886096655Z 127.0.0.1 - - [09/Nov/2021:11:51:15 +0000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.51 (Debian) PHP/8.0.12 (internal dummy connection)"
dockernextcloud-app-1  | 2021-11-09T11:51:17.488429485Z 32.105.85.119 - - [09/Nov/2021:11:51:17 +0000] "GET /apps/photos/service-worker.js HTTP/1.1" 200 6119 "https://cloud.texoviva.com/apps/photos/service-worker.js" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.36"
dockernextcloud-app-1  | 2021-11-09T11:51:22.250374740Z 32.105.85.119 - - [09/Nov/2021:11:51:02 +0000] "GET /apps/logreader/poll?lastReqId=nhFsdt4NrgNp4m1oNRrr HTTP/1.1" 200 791 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0"
dockernextcloud-app-1  | 2021-11-09T11:51:22.893010531Z 127.0.0.1 - - [09/Nov/2021:11:51:22 +0000] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.51 (Debian) PHP/8.0.12 (internal dummy connection)"

Try installing the Preview Generator app.

Worked for images but not for videos