Might and Magic, released in 1986, was the first installment in the series that would later evolve into a whole fictional universe, encompassing both the actual M&M games and a multitude of subseries and spin-offs made in their own genres, including King's Bounty, Heroes of Might & Magic, and others.
Normally, this game is rather long. This movie by Dammit skips most of it by using a glitch that allows the player to get all the important items in a matter of a few minutes.
We strongly recommend reading the author's comments for further details and explanations. The YouTube and primary downloadable encodes have the author's commentary as subtitles.