I like to do this but I don't have a cell phone so I act like they don't either and just answer them like they are talking to me. When they get upset (as almost always happens) I explain that I was certain they were talking to me, since I wouldn't simply assume they were being rude and talking loudly on a cell phone in public while expecting some kind of privacy at the same time. If they can't understand that, then I call them Eric Cartman and move on (when possible).

Simply awesome comedy.

Social awkwardness FTW!

He was the one talking loudly so he's either crashing the calls of the wrong people or it's all fake.

It would be funny if he was actually annoying people who were being a bother to others and deserved it, but those people were all speaking at a very acceptable volume. He was just screwing with them for no reason and that's just a sophomoric dick move, especially for an older guy who should have more respect for society and himself. Just desperate for YT views I guess.

Isn't he that guy who does the "awkward" Cosplay model interviews?

Yes and also those "Fucking boat" type videos, which were the only ones in which he demonstrated a little originality. Since then his shtick is all about being childish prick.