Show current/remaining video time

Hey everyone, I’m just wondering if there’s any way to get the video current/remaining time? Also is there any way to add support of mkv videos on my NC?
The problem is that people who work with NC need to be able to check the time of some actions on the video, but the player doesn’t have the time scale. And while trying to open some formats (e.g. mkv), the download of the video starts insted of playing it on the web.
I’m using NC 15 version

Thanks everyone!