I would like to be able to play my video on the time line (i.e. hit spacebar and watch in the preview window) while moving a png circle around the screen (on another track) using the track motion window... this is possible if I go frame by frame but when I press play it doesn't ad keyframes to the track motion window....     basically I have a video off a person moving around in a crowd, I want to be able to track there position on the screen by moving around a png (a yellow transparent circle) I have placed on another video overlay using the track motion ... is this possible?  it is long and I dont have to be perfectly accurate so playing the video while I manually drag it around is prefered to haaving to keep going a few frames at a time and creating a key frame...
thanks Geoff