Made a recording but wanted to give my quick/rapid feedback of fixes that'd be needed
You can cheese the ending Chase sequence by going towards the monsters square-chase room and letting him go down the hallway first, since he doesn't have pathfinding to You but the end of the hallways.
I soft-locked my game in my 2nd playthrough looking for the secret ending but saw I could 'skip cutscene' while using the camcorder/looking back at the spiral-staircase recording and it made everything break/go black.
I found out you could also regrab the camcorder to re-look at the footage in the process and Not exit out of it (Which is what lead me to the mistake above, not wanting to re-roam the section and hoping I could just put the camcorder footage down.
There's a chance I'd argue that the secret is within looking at one of the video footages a 2nd time to see if somethings changed unless that's simply an oversight.
Otherwise, my video will contain my feedback/criticisms (and praise :P) Hope to see more.