To learn from, "The Simple Art of Winning" by Rick McKinny gets great reviews from folks who have proven their shooting prowess. Masters of the Barebow III is, I think, the best instructional video on the market. Easy to understand, easy to follow.
Any of the Fred Bear vids are entertaining, as is "The Legendary Hunts of Ben Pearson", "Moments of Truth" with Bill Negley, and "The Lost Antlers"--all are great.
My advice is do your homework. If you want to shoot better, get advice from proven coaches (i.e. Rick McKinney, Rod Jenkins, etc.).