VirtualDub is a free windows tool for slowing down the video down via frame rate. On the Mac I just step through it in iMovie or QuickTime. But you'll still be limited by your camera's frame rate.
And just so you know, it's really hard to capture the timing issues that are keeping us all from unlocking our distance potential when viewing still frames or slow motion video. If your problem is wrist extension or not pulling tight enough, I guess slow-mo would give you some insight into that. But many problems boil down to timing.





