I don’t think most of my students need help falling asleep, but I thought this was a funny concept. There’s a timer, of course, in case you do fall asleep. And there’s also a siesta mode which rotates the videos so you can still watch while you’re lying down.
Some of the videos (which are not original videos, but curated from YouTube):
The sound of rain
Counting Sheep (this is funny because in English, people say that when they’re trying to fall asleep, they count sheep)
Life of Panda