No, it happens for me on Linux too. Yesterday it crashed the page on my new laptop.

Starting yesterday afternoon, YouTube doesn't play anything in Firefox (+ublock +sponserblock on Linux) for me. Thankfully, youtube-dlp still works just fine, so it's a minor inconvenience.

Same for me. I have yt premium + ublock origin, perhaps this is related to their war non premium users having adblock.

No, it's become unusable with or without ublock origin for me.