I think you're right. In the 8 game format in the video, I was just saying 8 points over / under before the pro wins 8 games. Even there, I'd probably take the under. But keep in mind, the 4.5 player is simply trying to win as many points as he can. So he's going to be going for winners on everything, not worrying about the game score. So the incentives are a bit different than a normal match.
I also think in this handicap format (starting 0-30), there's no way he loses a game if he's REALLY trying not to. They may even touch on this in the video (I don't know, I only watched a few minutes. I only realized this was a handicap 0-30 challenge after you responded).