Your iPhone’s slo-mo function is a ton of fun to use when you’re taking action video of yourself or your buddies as you ski down mountains and base-jump off cliffs. If you’ve got an iPhone 5s or later, you know the joy of capturing all the action in a much slower timeframe and then using it to make fun of the faces your friends make when doing extreme sports.
But what if you want to un-slow all that down, maybe to focus less on the funny faces and more on the fast action?
It’s pretty simple to do, though you might not notice how at first. Here’s how to speed up the slo-mo videos you’ve taken with your iPhone.

