It's not required, no.
It's advised though. That social network plays a not-insignificant role in YouTube's video-scoring algorithm.
I just did it then removed it again. Are you saying having Google + linked is a good thing ? "YouTube's video-scoring algorithm" ?

Yes, it's a good thing. Having Google+ activity will have a positive impact on your channel and video's visibility.
Heck, the platform itself would be so bad is people actually used it![]()
so i bet it'll search google+ for SEO stuff over facebook and twitter =p
Yes, it's a good thing. Having Google+ activity will have a positive impact on your channel and video's visibility.
Heck, the platform itself would be so bad is people actually used it![]()