Are you referring to this? I would think of this as choreography. It’s kind of like The Wave, but in costume. It reminds me of a Busby Berkeley production number.
Yes, like the commercial at the link you provided, april. Not so much painting on a body; the work shown on Mole & Thomas is closer to what I am looking for, in that people are making up the individual components/pixels of a picture, but I am actually more interested in the live action version of this. Meaning not picture, per se, but moving and animated designs, such as in the Spencer Tunick link, or like the kids in this music video Mad World video.