This is meant as a video walkthrough of how one can easily make it past the mummy bombs on chapter 19 of Uncharted 4 while playing on Crushing difficulty. I skipped the combat encounter in the middle because that's not the focus of this video. The fast-forwarded part is when I was looking around the map to see if I'd missed any bombs, since I havent played in a while (I still remember the path across the booby trapped wooden floor through).
I have heard a lot of people say this part of the game is so difficult that it is actually broken, but I don't see where they're coming from.
The trick is that you have to realize that you cannot avoid being damaged entirely and that you don't have to roll as far away as possible; you will always be stunned and at least a little hurt by the explosions. You have to roll to a position where you will be at an adequate distance to not die from the next exploding mummy bombs, because they usually will detonate before you are un-stunned and able to roll away. The bombs have a huge damage falloff with range even though they still stun you, and Nate can tank like 5 bombs exploding at once as long as none of them are closer than like 8-9 feet away.
Also, lots of times you have no choice but to roll forwards towards/past some bombs that are about to detonate, because there are even more bombs behind you.