My son went to a coaching school, they videoed him and one thing they did was watch his head, weird thing. They had stuff to make a line somehow and guy siad he should try to keep his head level.
He likes to watch old videos where he did well to see if he changed anything since. Hang on to your old videos and watch your improvements.
When we videoed me I saw why I got back aches so often, boy did I twist at the hips rather than bend my knees. Really weird form.
One bad thing with the coaching thing, he learned too much at once. Went back to the same guy a year later, guy told him he had too much in his head. Same thing mom told him for months!! His game actually went down a lot for a while because he tried too many new things at once. Knowledge is great but too much at once can be a killer.
I wish I could caoch him. Last tournament I watched him struggle, I said to my daughter and hubby, watch his release form, it's off but I don't know why. We watched his appraoch, I looked at my daughter, that's his good form before the ball hit, Strike!! Good form is so basic and essential.