A free program for Android, by Appgenix Apps.

Are you one of those people who always have their phone on hand? Whether you’re in the middle of a conversation or just need a quick break from what you’re doing, having your phone around can be a big help. But sometimes, when you have your phone in your hands, you’re not really in a position to use it, because you’re also supposed to be making calls or sending texts. And when you’re doing that, you don’t want to waste your battery on a video recording. 

With this app, you can make videos in the background without having to minimize any other apps. It also lets you make longer recordings than you can with the phone screen locked, and you can open and use other applications while recording. You can even record audio in the background.