Playing Jago as a "Yeah, whatever these guys are" type character is a valid choice. It may or may not be the best choice for a video meant to promote the game, but it's a choice.
But poking around with your phone mid-game is generally considered bad form in a private game (unless you have your sheet on D&DB or are checking AON or something like that), and moreso in a game people are supposed to be watching. He does become more animated later, and there's one time where he's clearly using the phone to take a picture and maybe post it somewhere so maybe that's what he was doing at the start as well.
I want the best for this game. On paper, it looks like something that should be up my alley, but I would of course need to play it to see if it works as well as I hope. I don't want MCDM to drop the ball.