When playing back 4:3 aspect ratio (1440x1080) 10-bit HEVC videos on my Raspberry Pi 4B, there is a large bar of garbage comprised of sections of the video in question (with the colors slightly off) and a green glow on the right side of the TV where the black bars around the video should be.
Log: http://ix.io/1qp4
Attached is an image of what the errors look like.