I'm using MacOS BigSur and with v2.9.5
Once you start a media item (mp4 in my testing) the arrow keys stop being able to move through the service list and I have to use the mouse to get it back.
Also while playing the media item (with VLC) the time clock is not updating to show how far through the clip you are.
Unlike 2.4.6 there is no control to move you through the video
Comments
I have deleted and re-added the video and the timeclock and control to move through video are now there - may be an upgrade from 2.4.6 issue ?
There is not local display of the video in the LIVE preview window.
Due to the nature of how video generally works on computers, you can only have 1 video output, so you won't see the video in the live preview (other programs that do this usually cheat by actually playing the video in two places, and just muting the other).