I checked the small dependency:
since my main language is Russian = I use the Windows username in Russian, the path to $saves, which is in the documents in the DayZ folder, turns out to be in Russian.
Apparently, when trying to load a video with the path $saves , he sees that the path relative to Windows is in Russian and does not want to load it into the widget. Tested the same code with a person whose username is in English and everything works fine!

I would also like to send custom headers, like bearer token and other things, but at the moment this is impossible to do.

I hope for your speedy correction, because the video widget is a very popular move among modders

knock Knock :)
It still doesn't work on PC
m_Video.LoadVideo( "Path\\To\\Video.mp4", 0 );
m_Video.Play( VideoCommand.PLAY );