Few things:

1. I initially thought this is chef.io recipes, but this is actually different.

2. This is a great idea, I've been personally using a password recipe for a long time now, this is a great way to only remember one thing but still have different passwords all over the place.

3. I would also create a chrome/FF extension, this will be much easier for most people to use. I really hate taking out my phone every time I need something like this, this is why I hate 2 factor authentication.

4. The information above the fold is not enough to understand the solution without watching the video, most people will exit at this point IMHO.

Good luck with this!