Also, had a fun bug recently with the G+ Page/Profile bullshit where I deleted my Youtube Channel account so it would stop asking about G+ integration at the cost of no longer being able to post videos or comments. (However, jokes on me, as they just forcibly integrated my G+ with Youtube ONE WEEK after I explicitly deleted my Channel account to prevent exactly that from happening. Thanks, Google.) It didn't erase all of my subscriptions, but it made them all nonfunctional. My feed was completely empty despite the channels having many new videos, so I had to drop and re-add all of my subs to fix the feed.
I take solace in the fact that this most recent forced integration and re-purposing of G+ posts has been an unmitigated disaster.
It's very entertaining to see videos a few years old just FULL of G+ Posts, not Youtube Comments, from people who don't even realize those posts were public years ago. And now they're getting tons of attention of G+ posts through the Youtube website from mean and vicious Youtube commenters.
It's basically the exact opposite of what Google used to stand for online, with regards to privacy, safety and respect for users.
Probably my fault because I always decline these things until Google forces the integration upon us anyway.
Myself, having already been thru a Google domain account merge fiasco, when confronted with the gaccount merge at YouTube just created a new useless account.
its amazing that they host video by artists and yet do not allow the artists to use their artist names. all in the name of stamping out comment wars.
[1] http://www.youtube.com/watch?v=Ccxiwu4MaJs
Edit: NSFW- language/curse words.
Turns out she was completely wrong about having lost her data, the UI was just confusing in such a way that she thought she had. Don't get me wrong, that kind of confusing UI is very much Google's Problem, but "confusing UI" and "lost all my videos" are _very_ different in magnitude.
Most people seem to hit trouble when they have a G+ account or have accepted any of the changes that Google suggests. Which is really lousy user experience and Google should really know better.
So far, keeping out of G+ has kept things usable for me on Google. I am heavily dependent on Gmail, consume a lot of content on YouTube and use Keep extensively. There is a different G+ account that I use for Hangouts for work.
But I don't see things getting better from hereon. In fact, I fully expect Google to mess this up even more and I am saying that as a fan of the company. That's the day I'll pack up and leave. It has been a good 10-year run, and all good things have to come to an end someday!