IMO your best investment in a shooting video is Masters of the Barebow, Volume III...and I'll go ahead and say Volume IV will also be very good, from what I've heard so far.
Scott is a dang good shot, but his first video is a bit off the wall to me. Rick Welch is also an amazing shot, but the info. doesn't translate that well in his videos IMO.
MBB is clear, concise, easy to follow, easy to understand.
'Course the best thing to do would be buy them all, they use what works for you.
Chad