Help with Sprinting mechanics

That strikes a chord with me! Thank you!

I was watching a Tom Tellez youtube yest and that exact same thing came to me. Thank you! Very sharp eye.
I seem to be moving my arms from my elbows down but not my shoulders at all hardly!!
Thanks Guys - plenty to work on

Any advice on the best angle to video myself running. I usually train on my own so getting someone to video me is hard. Directly side on after about 20m start seems to give a decent view.

I am going to train with a sprinters group for the 1st time ever next Monday - very excited!