Mastery in any field or craft is welcome - construction, sculpture, martial arts, music, cooking, motorsports, you name it - but heavy preference for videos with camerawork and/or explanation that allows the viewer to appreciate the level of technique, precision, efficiency, and focus on display.

Also, I'm really referring to the practical demonstrations rather than analytical breakdowns after the fact, but if you have one of the latter and feel strongly about it, feel free to share. Long watches welcome.

Examples:

Jacques Pépin deboning a chicken from 5:00 onwards

A showcase of the incomparable Zinédine Zidane's ball control

Red Hot Chili Peppers drummer Chad Smith plays 'blind' covers of Thirty Seconds to Mars and Bring Me The Horizon

Grandpa Amu assembles soccer ball out of wood

Lyrical breakdown of Lupe Fiasco's Mural