This clip comes from the footstep sound library of Half-Life, the 1998 Valve shooter whose GoldSrc engine powered a generation of mods. Counter-Strike 1.6 runs on that same engine and shares much of its material audio, which is why the crunch also circulates among CS players ripping classic sounds. Short game SFX like this spread through soundboard communities and meme editing packs, where a sub-second effect is more useful than a long sample. It endures because the noise is instantly readable: one crackle and the audience feels the step.