I recently ran across an interesting app for my smart phone: Coaches Eye.

It is basically a video app that has tools to allow you to analyse and mark up the video. It has a "scrubbing" wheel that allows you to move slow motion or frame by frame through the video. You really can pick up on a lot of little things when you slow a video down. I'd share my first video, but my form was less than optimal! Maybe after I work at it a bit, I'll post a clip.

It is available for Android phones, and the iPhone. So far, I've found it to be quite useful.

akbb,

I have used V1 Golf for a while and still do but just bought the Coach's eye for both my Android phone and iPad ( I know ...) it is a good video program and as you say, you can put (draw) references on the video and run at various frame speeds.  See what you want to see then learn and then delete and repeat.

Good stuff for $5.

Arne