The same effect was found among those who held a cool pack to their forehead, whereas those who held a warm or room-temperature pack yawned while watching the video.

Imagine if Comcast customers couldn't watch Netflix, but were limited only to Comcast's video-on-demand service.

You can browse the Web watching videos until your eyes glaze over, but you can't easily save any of that video footage to your computer in an organized library.