Damn, brings back much memories.
Bunny hop, shoot, bunny hop, shoot
I am not sure if this is made with source engine, would it still have bunny hop if not?
no, bunny hop is an artifact of quake strafe code, which was retained in valve's goldsrc. it was fixed in Source since it's a completely new engine, but goldsrc counter-strike also had its own mitigations, which I assume were special cased hacks. I played from early beta (russia LAN party "pro" cs player here), and I distinctly remember when bunny hop stopped working. I was running out as ct on de_dust, and went to do a hop and it wasn't working. "they nerfed hopping! the game is RUINED! the casuals won!" etc.