the.com/playback

means The act of replaying something recorded — audio, video, or data — so it can be heard or watched again.

from A straightforward compound from "play" (to set a recording in motion, itself from recording/broadcasting jargon) plus "back" (in reverse, returning to an earlier point). It emerged in early-to-mid 20th-century recording and radio technology, when engineers needed a word for running tape or disc back through the machine to hear what had just been captured — distinct from "playing" live. The term stuck as recording technology spread from studios into everyday life.