how can i do this too?

Wat.

wtf. I've tried to do the second one so many times

independently confirmed that these are actually possible, just for reference I can get demoman up to 350 (but not much higher, also the base speed is 280) horizontal speed consistently with a perfect bhopping on flat ground script. It doesn't seem to be friction that's limiting it, because for demo I can get it to sustain 336ish while moving in a straight line, and I can keep around 360 with a 300 speed class (sniper). So, yeah, it's harshly limiting the speed when you hit the ground jump but it's limiting it to 120% class's actual base speed, and it's totally impractical because the only way to do it consistently without cheats (even the wait command proves inconsistent because of framerate variation) is to have a fine scroll wheel and bind +jump to that.

getting 3-5 perfect jumps isnt very hard if you practice a lot you can almost perfect jump all the time with any mouse

what kind of in-game speed are you getting for that last jump? i feel like i'm getting close, but can only do it with overdose at the moment.

Who has a link to youmustmuke's youtube he had a tonne of bhops

Edit: Found it http://www.youtube.com/user/DeselectYourMind/videos?flow=grid&view=0

its defualt speed for medic

Can you do it with cl_showpos?