Footstep sounds like this come from the 8 bit era of the 1980s, when home consoles generated all audio with simple square and noise waves because they had no sampled sound. Modern creators recreate that limited chip style to evoke early platformers and RPGs. Clips of short walking loops spread on soundboards and in video editing packs because they are easy to loop and instantly recognisable. They remain popular for game development prototypes, retro lets plays and comedy edits where modern footsteps would break the pixel art illusion.