I haven't used Dynamic Refresh Rate before, but thought I'd give it a go... I get a black screen when the refresh rate changes, then screen comes back when I stop the video. Really not important to me because almost all my stuff is 50 or 25Hz, but I've attached a log in case it helps with something.
My default refresh rate is 50p, and I started and stopped a 23p video a few times.
If I press Windows key the display comes back as before
Thanks - I should be able to try that this evening. It's really not that important to me though - don't waste too much time on it unless you think it will help other people...
That one works some of the time but not every time (I would guess something like half the time). Still works fine on resume though.
Logs attached - I started a few video files with non-50hz refresh rates. Some worked, some didn't (sometimes with the same file)
I won't be able to test any more today but if you put something else up I will test as soon as I get the chance.