In the T bar, i would like to see a pause and squeeze at contraction, you see movement only at the shoulder, that would eliminate momentum, stimulate more growth and improve back health, also hands placed wider would mean more movement at the shoulder blades.
I like what he's saying about rest between sets, that improves metcon which inturn improves strength to another level.
I like what he says about chin-ups, with the pulldown he replicates the movement of a really good pulldown they have at PTC frankston, a nautilus gen 1 BTN pulldown, no other machine like that one.
The barbell curl and reasoning behind it is just silly, better would be to adopt a normal stance and (moving at the hip) lean forward at contraction this maintains resistance and load.
He's spot on about hand placement on chin-ups, you can actually see much more movement around the shoulder joint when he illustrates this.