Might and Magic, first released in 1986 for the Apple II and later receiving ports to many other systems, is the first installment in the series that would later evolve into a whole fictional universe. This universe encompasses both the actual Might and Magic games and a multitude of other subseries and spin-offs made in their own genres, including King's Bounty, Heroes of Might & Magic, and others.
This movie uses the Japanese version of the game, which doesn't have the item glitch that allows you to easily skip most of the game.
TaoTao improves on the previous run by a little over 8.6 minutes thanks to a glitch where you can bypass a certain barrier without having to complete the Soul Maze, which saves a significant amount of time. Other glitches involving forfeiting battles and unlocking doors without needing the required class are also used. You can read the author's notes for more details.
There is also an alternate encode by the author that has a map on the side that better shows what the player is doing.