A brief summary of the business / site goals.
A site that demonstrates concept of web based remote control for HTML5 video players:
The key users.
The developers who curious about what can be done with socket.io
And then, possibly, for the people who are looking to improve the experience of watching films online.
Scenarios in which your app or site will be used.
The visitor should be able to watch short demo video by controlling its playback via the web browser on smartphone only, particularly any device with a QR code reader and compatible web browser.
Design style guidelines to follow.