If you want to comment now, you'll have to use either your existing Google+ account (which you likely linked to YouTube recently when Google did a large merge of accounts) or create a YouTube channel with a new name.
Positive: 100 %
Answer #3 | 23/12 2013 19:30
You must have a google+ account to comment, as it connects to youtube.
Positive: 100 %
Answer #4 | 24/12 2013 01:12
For comment on any YouTube video you should Login to your Google account. Some days before Google update some thing like that Google+ account is iterated with YT account, it also able to post to your G+ profile....