Where did you find that YouTube has returned ownership to him? As far as I've been able to find with a quick search, the false claimant continues to receive monetization from the video.
The comment on the video by the author of the video
> UPDATE: It's official! I got my video back and Ramjets channel was deleted for false copyright claim. Huge thanks to everybody who helped. Every share, like comment, everybody who spread the word about what happened. You made the difference. Now let's make sure we protect EVERY content creator from false claims. Please sign the petition, we can make a difference.
There's also a story behind how the signatures were delivered. [1] However, I'm not sure that this video explains the 'psychology' behind it.
In a wow-related podcast a few months back [sorry no link], Mark said that he wanted to deliver all the signatures in physical form on paper since that's a tactic that Blizzard itself had employed when selling their game packages back in the day. In a nutshell, the weight of something makes it feel more valuable. And in the case of 260,000 signatures, it doesn't just sound big in your head, but actually has a substantial weight in physical form.
> UPDATE: It's official! I got my video back and Ramjets channel was deleted for false copyright claim. Huge thanks to everybody who helped. Every share, like comment, everybody who spread the word about what happened. You made the difference. Now let's make sure we protect EVERY content creator from false claims. Please sign the petition, we can make a difference.