The Video application should be standalone again. In the 6.1 update (I think) it changed to be only accessible when playing a video via gallery or if opening a video from a files app for example.This means when using modes and routines you cannot specify that a video playing using this app can be part of the separate app sound condition and other things where you want to select a specific app.
As well as simple things like not being able to just have a shortcut for the video app somewhere. I did workaround this with a shortcut to my movies folder but in oneui 7 these shortcuts disappear randomly and so the issues of the video app not being in the app menus anywhere come back
Please just make it a standalone app again. It doesn't even make sense why it was changed in the first place