If you've got an Android device and a Canon camera you can buy DSLR Controller for £5.94 and a TP-Link TL-MR3040 for around £30 to do this. The white box in the video looks a lot like it could be a copy of the TP-Link hardware in a different case. If you have a camera with built in WiFi (like the 6D) I think you can connect your Android device and DSLR directly without needing the router.
It's quite a nice thing to have as it frees you from behind the camera and it's great for manual focusing.
Their app looks a bit prettier than DSLR Controller mind and presumably you don't need to do the firmware setup on their router like you do with the TP-Link one.