Not sure if that is the only reason, but I searched which games had wmv videos just put in some folder and those games didn't play videos. I think in my case most of the videos that have problems are in wmv-format. I understand the legal and such problems windows dlls have in open-source world and I really hope Valve had some kind of resourcess to fix the issue. For Wine it hasn't been fundamental issue, but for Proton the baseline should be different. I personally think Proton should really address this issue as soon as possible for skipping/disabling or just accepting crashing videos isn't viable. I spend earlier much time trying to get videos working in plain Wine and decided to try again and see if someone had got somewhere further this day. you might want to check it for games in question to see if you can fix the issue. Pcgaming wiki site has instructions per game on various settings, including videos. sometimes even this step won't ensure any stable result so it's often advised to just skip videos where available. Originally posted by Cat on Linux:videos even in plain wine require complex approach by installing codecs, flash and some of windows media specific DLLs.