The size comparison with the semi-auto was questionable because he really downplayed the grip. When it comes to concealed carry, which is the market for both guns in the video, that grip sticking way out could be a big deal. Beyond shrink-wrapping these for a volume measurement, I recommend getting them in your hands for a personal comparison. The semi-auto is a lot smaller!
Comparing it to a semi-auto firing .45acp raises some other issues too. Did he not have a Bulldog available? That would have been better. Comparing the Judge to self-defense weapons in general, it should have been compared with what people carry in general. Heck, why not compare it to compact high-capacity 9mm handguns?
Part 2 was more interesting. Yes, special rounds have been developed for the Judge and those do better. That helps. Is it enough to make it more useful than a high-capacity compact semi-auto (or even a full-sized semi-auto in some cases) that you could probably carry with more ease? When considering the demands of EDC, is it enough to make it more useful than a five or six shot J-frame or LCR?
The reviewer seems to agree with me on concealed carry but somehow concludes that the Public Defender would be a good nightstand gun. I'd agree that it could be. Then again, so could a lot of guns. You could put something like the 15-shot FNX-45 in your nightstand just as easily. Personally, I'd prefer that or many other handgun choices, maybe including the full-sized Judge, over the Public Defender as a nightstand gun.