Yea, it's a video of a portion of the Falcons/Texans joint practice, I believe in 2014 camp. Has JJ mauling young Jake Matthews, then playing RT. Falcons OL coach Mike Tice was making comments.
Watching that video make me think about who were the most physical pass rushing DEs I've seen (going back to the late 70s). Reggie White is clearly #1. I've seen him take a 300 lb OT and throw him 10 ft with one arm. Crazy stuff like that. Leroy Selmon had crazy strength. Get up under a OTs pads and drive him to QB before the 7th step. The Eagles Clyde Simmons had real power. Myles Garrett may be the best example today of a power rusher from the edge. But I would put JJ right behind Reggie as the best power rusher from the edge. And JJ could also get there with speed and moves.