It's extremely intuitive, no video needed. It's not difficult. Like I said, there's physics on ledges and structures in games that you can't see. No game has perfect collision. A player is in no positive to know where these invisible boundaries are, that's why a first attempt success is unlikely. Exceptions do not disprove generalizations either. But good on you. I'd imagine the older fellas whose hands aren't as steady as they once were had some trouble too.