I can sympathize with the woman in the video because I also always kept declining to link my YouTube login to my G+ login. I'm also considering deleting my Google account, and I expect that due to the horrible Microsoft-style integration once I do that anything I might have uploaded to YouTube will also disappear.
I'm going to be a bit contrarian here: Google should have forced the issue and made it less painful. This "decline decline decline" business was a freaking embarrassment.
The correct approach is "Your youtube account is now part of your Google account. Create a Google account if you haven't got one already for this. If you need to use a pseudonym, you can attach a pseudonym to your Google account and that will carry your Youtube information".
No declining, because that was a soft promise that Google had trouble keeping.