This isn’t the most practical app for everyone, but it’s certainly interesting to look at.
Re(play) features six clips of athletes being all athletic and stuff. High-speed cameras captured the footage at 236 frames per second, and you can either watch the maneuvers play out or scrub back and forth to study the movements in detail. That could be nice for people studying movement for art or animation.
But even if you don’t have any professional or artistic need for Re(play), it’s really just kind of hypnotic to watch.