I watch a lot of videos writing for Hackaday, and there's a lot of pausing and restarting while I take notes. I usually take notes by hand on paper, and if I keep doing that, this pedal will make it more seamless.
BUT, with a pedi-powered pause pedal, I could watch the video on my main screen, and take notes on another computer without taking my hands off the home row or switching focus back and forth between the video and the text editor.