Make an instruction account, then send Bob your swing — one video or a whole range session — with a note on what's going on.
That's not it. Try Monkey / Monkey — this is a demo, we're not animals. Well.
The pro's side of the glass: every student, every upload, every thread. Watch the film, type the fix, send it back.
No login on this door for the demo — walk right in, Bob.
Bob's homework was more film. Pick a video (or several), say what changed, and it lands on his desk — right next to the first one.
Demo note: uploads stay in this browser — nothing leaves your machine in v1.