actually the icing of the cake make a really good heat protectant it's gonna be hot, but if the icing is thick enough, and the phone is put inside at the end, it's not gonna be so ****ing hot that the phone will explode
I just saw the video. So the guy put the phone in the oven inside the dough for 20 minutes at 175º Celsius.
It wasn't too long and the phone accused temperature warnings and the dough got STUCK to it like a crust.
Can you imagine if he had baked it for 40 minutes?