He's doing a eloquent and very decent job of explaining push hands/Tai Chi strategy, centred around the idea of not resisting to force, but the clip is labelled "Fighting" - where's the fighting? How can you talk about fighting without showing any fighting practice like sparring?
Anybody could be forgiven for watching this, and then thinking that what he's showing you is all you need to be able to "fight" with Tai Chi, when it's definitely, oh, so definitely not the case. Maybe he should have called it something else?
I think John Wang would say "Where's the finish strategy?".
I think I would say "Where's the non-cooperative sparring?"