The landing page doesn't tell me what this does at all. I get that it does alerts that somehow get onto the apple watch, but nothing else.

"Discover our channels" --> what are channels?

Ah ok after watching the video I get a much better idea of how to use the app. I'm curious to know how many people actually click on the video to watch it. IMHO good direct copy on the landing page is worth more than a video hidden behind a click.