Kevin

What helped me understand QM was spending four years getting a degree in physics then never using it again.

I’m not sure off-hand. It could be an issue in a graphics driver at the kernel (amdgpu?) or user level (mesa?). It could also be a problem in something higher up. I would recommend posting an issue in the VLC repo and see if you can get better support that way.

Can you turn off hardware decoding and see if it works then?

https://wiki.videolan.org/VLC_HowTo/Hardware_acceleration/