Video thumbnail previews only available at the trash bin

Server: Lokal
Hardware: PC
System: Ubuntu 20.04

Nextcloud Version: 24.01
PHP Version: 7.4.10
Datenbank: MySql
Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, session, standard, sodium, cgi-fcgi, mysqlnd, PDO, xml, apcu, bcmath, bz2, calendar, ctype, curl, dom, mbstring, FFI, fileinfo, ftp, gd, gettext, gmp, iconv, igbinary, imagick, intl, json, ldap, exif, mysqli, pdlib, pdo_mysql, apc, posix, readline, redis, shmop, SimpleXML, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, xmlreader, xmlwriter, xsl, zip, Phar, Zend OPcach

I setup my system and start the preview pre generation process with the preview generator app. The task completed without any errors but there are no video previews. My pictures or documents have previews. But it’s weird because there are previews when I move the files to trash bin. The preview is gone again if I restore the file.

The file at my folder

The file at the trash bin

What an amazing support here :man_shrugging: