it doesnt matter were you jump at,every tv in there will make you elevate and you dont even have to jump on the tv, jump on the metal pole and it will still work, i dont know how this could be the sliding trick because if you watch it takes you up and then instantly drops you like an elevator would do, and you dont have to be in prone for this to work, stand and crouch works aswell.
what i meant is, you can't textureslide on a flat surface.
texture sliding is like falling off surfaces that are to steeb to walk on.
the 'sliding' option is there, but the steeb surface isnt, so u go straith forward.