Williams Sports Video - http://www.williamssportsvideo.com/
Here are a few links to choose from:
Catcher/3B - http://www.youtube.com/watch?v=FvzCHurMv4k
Catcher/OF(slapper) - http://www.youtube.com/watch?v=fh328nxk-zs
OF/1B - http://www.youtube.com/watch?v=SjqJjv4yOZY
OF/1B(slapper) - http://www.youtube.com/watch?v=Ll3rLUqXDfQ
Pitcher - http://www.youtube.com/watch?v=5BARJmMDuBU
Utility(MI/OF) - http://www.youtube.com/watch?v=YMJb7mcuIug