That's basically it. I don't really like to jump on the internet pitchfork bandwagon, especially when stuff like this tends to be seen through a keyhole, but the pranks (from what I've seen) are totally devoid of a "gotcha" moment where the absurdity of the scenario becomes apparent to all parties whom then reflect and laugh on the moment.
In these cases it's just a constant barrage of emotional (and sometimes physical) traumatising, with no "gotcha" moment, only normalising the behaviour by stating "oh it's a prank! breh!". In the tablet video there isn't really a prank at all; a scenario is constructed in which the older brother destroy's Cody's tablet, an item he obviously has an affinity for, and Cody's anger and frustration becomes the focal point for further belittlement and torment. The "prank" is revealed by the father...having purchased a new one? And will...like...help him set it back up? Haha, dude, gotcha breh. Pranked.
From the child's perspective the emotional experience is genuine. There's no reason for him to believe it's a "prank". There isn't a joke at all. All the experience is composed of is the father and brother justifying emotional trauma fixed on Cody by going "oh you're fine here's another tablet". There's an attempt to buy justification for that kind of irresponsible behaviour, which from a child's perspective simply normalises it. Oh, you can act like a total fucking shitheel, abuse people emotionally and physically, and break their stuff, just for kicks as long as you tell them it was a joke!