This seems like the sort of thing you see on April Fool's Day.
Netflix claims it has made socks that will pause the show or movie you're watching online when you fall asleep. The socks supposedly can tell when you haven't moved in awhile, but it's not clear how they can control the video. How would they know what kind of device you're using, and how to control that device remotely? Oh, you have to use the correct infrared settings in the pair you assemble.
Yes, you have to build the electronics. It turns out Netflix isn't selling the socks, but giving away instructions on how you can make them using that accelerometer and micro-controller you just happen to have sitting around.
Bottom line: don't expect any of the geniuses on "Shark Tank" to invest in your streaming-video-controller hosiery anytime soon.