Why did you build this?

I always record my app in the iOS Simulator and prototypes that I made in Principle and Invision Studio. But I don’t know how to put those videos inside a phone mockup to share on Twitter, Dribbble and my portfolio. Do I need to use Adobe After Effects or a video editor? I don’t know, man. But I know how to build this thing. So, I did. Now you can have it too.