I've posted a bunch of high speed / slow mo videos of the 2010 IBO Trad Worlds. Most are during the 3 Rivers Shootoff where many of the top shooters were gathered. I have more of the other competitors, but I didn't remember their names, so I didn't want to post untitled videos.
You can study the form of top shooters frame by frame. Using quicktime, you can pause and step forward and backward with your left and right arrow keys on the keyboard.
What I like to watch is the elbow upon release...if it goes forward that's a collapse....backward is good.
Arrow tuning issues can also be seen to some extent as the arrow initially comes off the bow.
Here is a link to the videos.
http://talonoptix.com/2010TradWorlds.html
If you don't see the video, you might not have quicktime installed (it's free) or your ad blocking software might be blocking it.