I’m not sure off-hand since I’m not too familiar with VLC.
I would imagine 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.
I look at the contributors on Github and check them out. I’ll check out what else they’ve worked on and maybe see if they have an account on mastodon or twitter. Maybe I’ll ask some friends if they’ve used or heard of the product, or know of the devs.
There is indeed malware disguised as OSS and you do sometimes have to vet them. I’ll skim the codebase and see if there’s anything that looks weird or funky, but that’s not perfect (like in the case of the xz) and some stuff can slip by.