No this technique is deff called edge sliding. Call it what you want but edge sliding is the proper term.
Who would rate this video low? I mean me and jagged arent exactly friends but whoever rates this low is ****.
It`s actually called "Anti-Crouching," and has been a halo technique since H1.
In H1, you could do this to get a death from a fall, and prevent an enemy from getting a kill.
In H2, it was called "Power-Slide" and could be used to get down ramps very quickly (e.g. Long Ramp on Lockout)
In H3, I`ve been using it to get to Splazer on Valhalla from the Man Cannon since I found it accidently in the Beta.
I didn`t make any video or tutorial, cause I was hoping that I could abuse it in Big Team for a few months longer...
and kudos on the vid. very helpful, thanks.