The inputs for places where you can't just hold first-person-mode in midair is pretty much: Jump, Jump x2 +FPM x2, mash FPM. You can't move while you do this. Grabbing ledges was tested but doesn't do anything weird and Purple Lums cannot be grabbed. Apparently at 0:28 Rayman also made the sound for climbing up a ledge, mysteries!
Rayman 2: The Great Escape Statistics For KirbyComment
Currently, KirbyComment has 132,201 views for Rayman 2: The Great Escape across 62 videos. His channel published over 1 day worth of content for the game, roughly 7.59% of Rayman 2: The Great Escape content that KirbyComment has uploaded to YouTube.