As with any good magic, it's all done with mirrors
Its name–Love Box–might sound like a male adult toy, but it is in fact a video mixer for the iPhone. It’s not an app, nor is it a complex control board filled with knobs and dials. Instead, its all done with mirrors.
Or mirror. The Love Box, from the Honest&Smile agency in Barcelona, Spain, is a wooden box with a mirror inside, set at an angle. Another slot holds your iPhone 4/S. By finagling the iPhone’s camera into the right spot, you can shoot split-screen video (and stills): the right side shows what’s in front of you and the left side reflects whatever is behind you, and slightly off to one side.
Clearly, it is quite ridiculous and unwieldy, but that kind of problem hasn’t stopped 15 zillion people from using Instagram. On the other hand, Instagram is free, whereas the Love Box is costs close to $100 from the Etsy store (or the Regalador store in Spain).