I'm unsure if it's related, but the timeframe matches up pretty well. I use "Custometube" so that I can browse Youtube with a layout that doesn't suck, a few days ago it started refusing to work properly. I use the pre-2012 layout, now recommendations are being forced below the video, video timelines are broken, fullscreen just scrolls halfway down the page, comments are on the side, description boxes are fucked (as well as titles), and nothing I've tried tweaking has fixed it. I still don't see ads because I use Brave, but I am once again getting sick and tired of shit for brains pajeets in high places ruining my user experience. I often wonder what would need to happen to drive a mass exodus from Youtube, and towards either alternate sites or self hosting.