Thanks for the tip.
Coach’s Eye is the app I currently use, but it does not allow keyframing, so I can only pause, illustrate on a still image, and then press play again.
Including a 2nd track title, and using shapes/lines there, I can keyframe these to highlight a moving section/clip. But the shape editing is somewhat limited, and the tracking is very manual right now
FYI - I have found exactly zero ”motion tracking telestration” products out there - this could be a whole new extension pack/product for you to sell as an add-on. With the frame&fit and multiple tracks, LumaFusion has all the required platform features to build a killer feature - just provide a ”player spotlight” shape, and ”freeshape polygon” + ”multiple section” line with moveable individual shape points and that’s it. If possible, automated shape tracking/connection of those endpoints to video shapes. Professional TV-studio style sports telestration right there - all the ’draw on still images’ type tools would be out of business in a matter of days.