This can take pride of place next to that 4 minute long Morrowind speed run. Somebody's posted a video that travels all the way through Myst to the ending cutscene in a whopping 1 minute and 45 seconds. The footage is old as the hills, but the Hivemind policy on this is clear. If none of us have seen it, it's statistically impossible for any of you to have seen it.
And here's that Morrowind speed run, in case you couldn't be bothered to click on the link.
The best bit is totally the fight with Dagoth Ur at 6:06. "What a fool you are. I'm a God! How can you kill a-- WHAT ARE YOU DOING?"