Notice the bending in OP's video isn't the same level of bending in the pocket-bend claims. The latter is much more subtle, yet still noticeable. I'd say any kind of permanent bend from just being in pants' pockets is a design flaw.

I have a bent iphone 5. I bent it by accidentally dropping it, having the back of the phone land perfectly on the small ledge leading into the doorway of my home, and then stepping on the phone (I weigh about 200lbs.)

The phone bent, but the glass did not break and the phone is still functional. That surprised me. It's actually quite curved. I'll try to get a photo of it later, not near my computer with a webcam at the moment.

I kind of lost the point I was trying to make. Mostly just posting to say, I bent my phone but it took a lot of force.

If they do in fact bend in tight pants it won't be a joke. Apple will not be afraid to tell people that they need to use a case or that they're wearing their pants wrong.

He doesn't have to use much force to get the kind of bend that would be noticeable when the phone is put down on a flat surface. I can easily see that being possible in a fitted pair of jeans.

I suppose that the pants' tightness would also be a factor. Roomier pants would theoretically be less likely to bend a phone than hipster-tight pants.