The worst thing I see in his stroke (I'm a newbie swimmer, so I'm still missing a LOT!), is his early 'pull' really slips. He should try to set up an early vertical forearm. The first third of his pull is wasted. Part of that might be due to lower body drag.
I'd also like to see his head looking down more. He seems to do this scissors kick thing.
Other than that, he seems to be blessed with fairly good fore-aft natural balance, which could probably be improved even more with head-down position and balance drills.
Last edited by novaswimmer : 09-07-2018 at 11:08 PM.