This segment of the tool assisted run covers Corridors 9, 19, and 10. Why not 20? Because 20 has a boss that, as of this posting, is impossible to defeat without taking damage. There may be a way, but I have yet to find it.
Also, there IS a small hiccup in the recording around the time I get to the Corridor 10 room. Hopefully, it won’t be an issue in the final single segment video.