Stayed to the speedrun.com rules for posting to the best of my abilities. I calculated my time from the frame I hit the starting pedestal, to the frame the gear selection from killing the final arbiter appeared. Since load times do not count, I removed the time from the frame with the last bit of light disappearing after hitting a pedestal/opening a door to the frame before the light showed on the next level. There were no other runs posted so I tried to be as systematic as possible.

I know there are a few areas where my recording got a little sketchy, but I hope you accept it. If my time needs adjusted comment on the video.

Time splits 60 fps (calculated from source video add 5 seconds to align with youtube timer) Format Min:Sec:Frames

Trial Start 4.20 Temple of Anomaly Door 45.47

Temple of Anomaly 48.39 Plaza of the Worthy Door 3:43.06

Plaza of the Worthy 3:50.06 Arbiter Cutscene 4:04.29

Arbiter 4:06.27 Throne Room Door 4:56.18

Throne Room 5:01.36 Cut Scene 7:01.02

Throne Room 7:02.51 Altar of Okriel Door 7:28.07

Altar of Okriel 7:35.30 Enter Hall Of Sculptures 12:26.51

Hall Of Sculptures 12:29.58 Father's Sanctum Door 14:56.54

Father's Sanctum 15:00.13 Cut Scene 15:19.32

Final Arbiter 15:22.24 Gear Selection 15:59.50

Total Time 15 mins 19 secs 52 frames or 15 mins 19 secs 87 ms