The most ridiculous thing is that they fucking disabled the ability to turn it off on playlists that you've actually created...
Okay, so let's give users less control over the things that they have made for themselves... but we'll allow them to do it on the youtube generated "autoplay" feature, which absolutely nobody wanted or asked for!
YouTube updates are almost as bad as runescape ones circa late 2007 (If you played then, you know exactly what I mean). Biggest load of pointless, counter productive bullshit that just ruins the website.
Yeah, it's stupid, but for me, the most irritating phenomena is the certain sites' architecture to increase clicking - you know, there is some short article fragmented into 10 pages and you have to click 10 times to read throughout. I usually don't visit sites like that, but still, it's pain in the ass.