what is that new humble bundle? :/

Exactly what the video says it is.

Mojang, Wolfire and Oxeye studios all make games in 60 hours, and you get to watch the whole thing and have the end result.

Literally the first complete sentences on the page:

Watch live, as Mojang and friends create games from scratch in the span of a weekend! Pay what you want to get the games, and all proceeds go to your choice of four excellent charities!