Yes, it is, and as explained in the video the original author (and also the person explaining it) admit it is quite a claim, then proceed to demonstrate the veracity of the claim. I suggest you grab a cup of jo, settle in, and watch it. It addresses the points you bring up directly.
[EDIT: Re: Quite a Claim: Yes, and thus fitting the OP’s “mind-blowing” criteria for the thread :-)]
The very short answer to “are you immoral for purchasing a cell phone” is “probably yes”.
The proposition is not an easy one (it accepts it is extreme), but it is hard to deny when you march down the logic.