This is a tool-assisted speedrun. For more information, see http://tasvideos.org/5627S.html
"SM64: The Green Stars" is a Super Mario 64 ROM hack made by Kampel in 2013. It introduces new harder levels, custom music and a greater amount of stars to collect.
TASers 4232nis, homerfunky, and sm64expert use the game's various glitches to blast through the hack, finishing it with all 130 stars.