MP4 are not rendering in rendered playback

[thekameleon]

I am using 2020.4 and I tried rendering and previewing the Drummer Boy Live LATW sequence and I am noticing that they are not rendering.  I know some OpenGL changes were made in 2020.2.  Are there some caches that I need to clear? JPGs, Gifs, and effects are render fine.  In fact they render way better than before, just for some reason MP4 is right now not working.

[Gilrock]

Turn off whatever that hardware decoding acceleration is called and clear the render cache.