Help with my 10 year old pitchhing mechanics regular speed slow motion video

Please take at a look at my sons mechanics and let me know what you think

Rythem problems. Lower and upper body are not connected.

He shifts his weight back towards 2B before lifting his knee and going forward. This create unnecessary movement that can affect control and it gives baserunners a jump. The cause is that he sets up on the rubber with his feet too far apart. Have him narrow his feet position until he can lift and go forward only.

Agree with Roger…your son should try experimenting with a beginning stance that has his feet no wider apart than armpit-to-armpit. Maybe just a little bend at the knees. As he goes into his leg lift have him start his front hip forward, toward the target.

I appreciate the feed back gentlemen