As a personal trainer and someone who taught functional training (not movement coaching) years before it was popular, the beginning was a little cringe worthy but the rest was fine.
His coach that he was talking about seems fine and to know what he's doing, Jeremy doesn't though. He's just regurgitating things that his coach told him but has no understanding of it. Hence "his back has lumbar" etc.. and i think Joe was picking up on it
Seems like a cool guy otherwise, though