First, TPM's comment about over-coaching is SO right. Especially for boys who battle getting out of their own heads.
Second: My son's coach told me last night that he video'd JP's swing in the cages a few weeks ago -- with an iPhone. He showed my son his swing alongside Adrian Gonzalez's.
Importantly, these two have been together for almost four years ... and this very well-known and highly respected coach really knows my son.
He told me that seeing that side by side video caused a light bulb to come on for JP. And that's been obvious on the field since.
I know nothing's absolute here, but I believe it was a big learning for my son. So I would NEVER say video cannot be a powerful training aid.
Not that anyone has said that specifically -- but there it is.
Go CARDS!
Your son is a senior, on his way to an elite D1 program, not sure video for a player in 8th, 9th grade is appropriate.
JMO