Stashed in: Best Videos, Imzy
Mesmerizing and evocative. Stands up to repeat viewings.
Found thanks to Eilis at Imzy:
Also mentioned in that post is Broods - Bridges:
Massoud Hassani - Wind-Powered Child's Toy Evolves Into Low-Cost Minesweeper Minefield Clearing Machine
Cat tries out a new and innovative way to poop: Acroscatics
Portal: No Escape (live action short by Dan Trachtenberg)
Katy Perry happy dance gif