Don't despair at what you can/can't/imagine to see. The posted Sun video quality isn't as good as their frame photos, so there could be posters/commentators with a better visuals than the unwashed on which to base their comments.
Double Bogey, I teach the same, but there is a technology shift that we have to adapt to: older helicopters had throttles on the collective, instant off and instant (relatively) stop of rotation. All new helicopters have remote throttles you can't reach, and dumping the collective is a crude tool that only takes away part of the torque.