Sharing an idea you care about is a generous way to change your world for the better.
As you've probably discovered, great work makes us uncomfortable.
Cheap is the last refuge of a product developer or marketer who is out of great ideas.
You gain converts by winning at something the existing provider didn't think was so important.
Learning is not watching a video, learning is taking action and seeing what happens.
So by giving people a tool that they can share and benefit from, it's a form of media that isn't controlled by Rupert Murdoch or the guys at Viacom. It is a form of media that is earned every single time it spreads.