Caption alpha-reveal beats whole-line pop-in captions

On short-form video, captions that pop in one full line at a time lose attention. Instead: reveal caption text ONE WORD AT A TIME, in sync with the spoken audio, using ffmpeg `drawtext` + `alpha` expression keyed to timestamps. 30 min to set up a reusable script per-project. Retention visibly jumps — viewers track the rhythm. Used across Basement Boys + Cheddy clips.