[jkn]

I don't really use YouTube so I can't say, but is there anything preventing you from keeping separate accounts on Gmail and YouTube, something that makes it less convenient than if these websites were run independently of one another?

[pi18n]

It seems that Google will log you in across all of their services if you log into one. So to use separate names, you would have to be logging in and out whenever you switch services.

[reddit_clone]

Or use multiple browsers.

[jkn]

Or use incognito windows. But yeah I see how that makes it less convenient.