Finally all 4 videos available (it isnt lxweJb7yTHM but IxweJb7yTHM it wasn little "L" it was big "i" and this video is tutorial to all switch locations)
I may be wrong, but I feel like they're the steps you take in order to find these links or something. Like, you turn right after reading the first link, and select that painting, that sorta stuff.
Edit: just checked, yeah, they're exactly that. The final video is a guide on how to find the switches. Kinda sucks you'll have to find most a them on your first playthrough for it to work.