0:16 - The product with sockets collapsed.
0:18 - Both sockets extended, used to prop up the phone.
At that point, you pretty much know how it works, and can reason your way through sufficiently many potential applications.
0:24 More landscape-orientation propping.
0:26 Headphone cord management...
0:27 ...which still fits in your pocket.
0:37 Portrait-orientation propping, with only one socket extended.
0:39 Mounting the phone to a belt using the sockets.
0:47 Using the sockets to aid one-handed operation.
0:53 Reiterates "my cord didn't even get tangled with all that dancing."
1:00 Concept renders, with extension and articulation animations.
1:05 Ability to prop the phone at smaller or larger angles from the surface.
1:13 Removal / replacement of sockets.
1:16 Visual customization of sockets.
I could go on, but honestly, the product is throughly demonstrated throughout the video, and you get the bulk of what you need in the first 20 seconds. The designer doesn't stop and actually say "and now I'm going to enumerate the features," but he absolutely does demonstrate them.
