ICO Run - not the best times but enough to get Castle Guide
Graveyard - 18:49
Windmill - 27:09
Stone Pillar - 33:57
East Arena - 39:26 arrival
East Arena - 47:55 departure
Waterfall - 1:00:57 departure - piston and water wheel jump on first attempt
Gondola - 1:03:44
Water Tower - 1:07:11
West Idol Stairs - 1:15:55 on arrival
Main Gate - 1:26:14
messed up on the gears once before exiting
the shadow fight and queen battle was flawless - as mentioned its doable but more than 2 mistakes and had to redo as the time was tight so no room for error.
I got the piston jump and water wheel jump on the first attempt in the waterfall area so that was crucial to keep the time close. The last save point is at the main gate - all the battles and the ending went with no issues.
I used the first video that Ellieeeeeaeeeeee posted.
Total time 1:59:23