Deleting Libs:VA/RadeonHD_drv_video.library fixed my issue. I can play video again. I put all the 2.2 files back and everything is still ok.
Amigakit,
Can you explain the difference between the HD and RX drivers? I have a Radeon R9 280x card that is the South Islands. That is one of the most modern cards but not the latest card. The South Islands appears to be the latest family that the Radeon drivers fully support. However when I was reading on another board, they made it sound like the HD were old ancient and RX were more modern and latest.