Libretube would have replaced the youtube app for me if not for how slow their instances are for me. So far I did not see any crashes but the pages would sometimes not load and would require you to change instances. I think the cause may have been that the instances are hosted far away from me geographically and that my current internet connection has been having issues for non-mainstream websites.
I haven’t played nier but from what I’ve gathered from the internet, Elden ring requires much more power than nier. I use AMD FSR for elden ring since some areas would have stutters. For windows, you can use magpie for it.