Ultima: Exodus is a NES port of the third game in the Ultima RPG series. First released in 1983, the game set many standards for the genre.
At TASVideos, that also includes being beatable very quickly through glitching and luck manipulation.
The author has provided a running commentary, available in all of the encodes and streams as togglable subtitles, so you can tell what's going on.
You can also watch this run being played back on a real console.