Unity video player - getting audio but no video

Have been trying to play a video for the final cutscene in my game. After updating to the current version of Unity I get audio but no video. I get this error:
“Got null handle from IDXGIResource::GetSharedHandle.”
I’ve tried looking the error up and don’t find anything. Any help would be very appreciated.

Not sure why it worked, but rendering the cutscenes as MP4 instead of AVI solved it.