The 2016 TAS was not great, this is a bit better.
A tool-assisted speedrun (frequently abbreviated TAS) is a speedrun movie or performance of a video game produced by means of emulation such as slow motion or frame-by-frame advance of the gameplay, and re-recording of previous portions of a performance. The idea is that such "tools" compensate for human limitations in skill and reflex, facilitating gameplay techniques that are otherwise impossible or prohibitively difficult.
This was made using nolem's TAS plugin, which can be found here:
Music: Shinichi Osawa - Ami Nu Ku Tuu from "The One"