This was timed using https://slashinfty.github.io/yt-frame-timer/ I started time the frame the cutscene starts. And I end the last frame once black fade finishes.

Starting Frame: 10.233333333333333

Ending Frame: 78.86666666666666

Total Time: 0h 1m 08s 633ms

Not sure is sub 1 minute is possible but there is still a few more seconds of improvement. On the first 3rd sunstone I use 2 punches and only should use 1. From there drint has discovered a back dash that will skip a fight area. My current time on that area is very very good so i'm unsure how much time this back dash saves i think it might be a second. The biggest potential time saves are getting an instant wall grab on the 2 wall climbs after double jumping. This is completely RNG however i'm unsure if anyone wants to grind to achieve this. Also when going up a stair case if you dash at the proper time knack will keep running at the end of the dash instead of stopping. There are numerous stair cases through-out this level so the potential total time saves of doing all of these perfect is probably a couple seconds. If we had a way to TAS i would say sub 1 minute is possible for this level.