I'll let someone else comment on production issues – what format, where to post it, etc.  I'm pretty low tech.  But, what a coach would want to see of a pitcher is game footage from at least the 3b angle and the behind-the-catcher angle.  The view from behind is important too, but sometimes that's kind of hard to do at a game from center field.  So, get that angle from a bullpen if you need to.  If he throws hard for his age, put a gun on him in that shot.  If he doesn't – don't.  Fill the picture up with the pitcher.  They don't need to see the whole field or any other players (except the catcher in the CF and C shots).  Make it easy for them to look at him.  No more than a couple of pitches from each view.

Coaches don't pay much attention to stats, but include the simple ones if he's had a good year.  Whatever you do, don't include any comments from you (his dad).  Coaches laugh at those. 

Include information on how to contact him and his coaches.  No one is going to recruit him from a video, but it might get them to take a look at him in person or contact his coaches.  So, keep it simple.

I think baseball is a very poorly recruited sport – as opposed to football, for instance.  Everybody knows who the studs are, but once you get past that level it's a crapshoot.  You have to be in the right place at the right time.  So, once you reach the age where they're paying attention (pre-junior year), you should just play as much as you can in places where they can see you.  And his coaches are a very important source of contacts.