Plus we have zero context for the recording. How far into the set is this? How many shows/days in a row? Is he sick? Is he drunk?
Singers both great and terrible blow their voices out all of the time. The problem with live recordings is that one bad video can erase a thousand flawless performances. Plus he surely wasn't that loud/exposed in the room.
It's out of his range today, or he's suffering major vocal fatigue. I've had a pretty similar vocal effect in the past when I was singing stuff that was probably too high for me and had a sinus infection. It sucks.