Lets say that is the case. He is a MLBer...who has to be able to tackle in space...and you are saying a DL...who works in a phone booth....used BETTER technique than our MLB? Because if you are a MLB...who is supposed to go low....but the runner....is already low...you would need to adjust your approach on the fly. Right? Aggressive pursuit...then breaking down as you reach the runner...to make any adjustments you need based on the runners positioning....is a REQUIREMENT of a MLBer.
At the end of the day...we are all Cowboys fans. I WANT him to succeed. But the excuses for this guy never end. I want to be WRONG about him...but he seems like a gigantic bust to me.
It's really silly to look at this clip of players trying to drive a heavy bag on a chain and draw any conclusions from it. It has no bearing on tackling during a game, so there's really no need for excuses.
I'm just offering my observations from the little bit that we can see. In a game, you don't tackle high because a running back will put his helmet into your chest and drive you back. You get your pads lower than his so you can win the leverage battle. There is never a situation where you tackle a player who is in the air but chained to an obstacle, so what form they used isn't really relevant to real life.
Jaylon went lower in this task which allowed him to drive the bottom of the bag up, but all that did was leave the bag on his shoulder without getting it moving at the top. His form would have worked well if he was tackling the bag. The other player hit the bag near the top, which caused it to start moving, then shifted to a driving position. I don't even know if he did that on purpose or it just happened to be how he hit the bag.
Anyone looking at this to draw any conclusions other than Jaylon didn't know the best way to drive a bag on a chain or perhaps underestimated how hard it would be is looking too deep for a reason to criticize him.