That's fine except I wasn't trying to comment. I was just trying to view some trivial video shared by a family member.
Instead I was assaulted with this UI atrocity forcing me to evaluate some complicated modal dialog before I could even view the damn video. I mean, look at it: it's a pretty clear yes/no question with three confusing answer buttons and none of the labels answer the question posed at the top.
I could tolerate it if it happened when I tried to upload, comment, like, report or favorite something, but just to watch? If I had been logged out I wouldn't have been hassled by this. Apparently my sin is having bothered to create an account at some point in the past when I just wanted to click the like button as feedback to some poster. Why is it so unreasonable to like things without endorsing them? I guess the answer it to delete my youtube account and lurk moar. Fine. This is exactly what wil warned about.
Whatever happened to freedom of speech. This is exactly what autocrats everywhere want and even we now believe it to be good - just because of youtube comments. Comments which reflect the real us. With a real name policy it will be replaced by a few polite lines with emoticons.