I got a Catch Phrase vibe from it...I do agree that it's a fun, clever format.
Not for nothing, but this might be the first case of a host being the grandson of a host.
It's also prominently mentioned on his website. For a kid who wasn't born when grandpa died in 1970, it seems to be a pretty important part of his identity.
He's a "YouTube Personality." (Insert universal "handjob" gesture here.) Pretty much anything that MIGHT link him to the slightest bit of fame or attention is an important part of his identity.