(Copy/pasted the majority of the text from Youtube)
This tool-assisted speedrun by MrGrunz aims to beat The Legend of Zelda: Majora's Mask in as little a time as possible by abusing several tricks and glitches.

It was made on an emulator, using frame-by-frame shooting, savestates, and rerecords to overcome things like reaction time and human error. As such, it is purely a form of entertainment, and is not designed to show skill.

The various tricks and glitches, such as the Fairy Fountain Wrong Warp Glitch and Bottle Duplication Glitch, have been described by me here: http://tasvideos.org/3194S.html

This TAS is the result of 2 years of hard work on the game. My goal was to get a time under 1 hour and 30 minutes. Although I discovered many new tricks while doing the run, I only barely subbed 1:30. Words can't describe how happy I am that I finally finished this project and I guess most people out there are very happy to see this run eventually done as well.

There's no way this run would've been possible without help from others, most notably, Slowking, who planned the whole route with me, had many great ideas behind a lot of the strategies I use, checked my WIPs and also motivated me all the time.