Massively Happy

This is a mystery puzzle in video form. By mystery puzzle, I mean a problem in which the player infers its rules from the activity itself, and its answer is (usually) in the form of a word, or short phrase. Mystery puzzles are typically “scored” on the basis of time you take to solve them; in this one, you can also choose to solve with less information, and use observation in lieu of logic, or vice versa. Please do not spoil the solution in the comments section.

Inaugural prayer

 

Sandpaper Simians
I shall endeavour to bring my posts to a high sheen before uploading, and let the Three Wise Craftsmen be my moral compass.