You can preview .html files hosted on github by prepending rawgit.com
to the link of the html.
Go here:
https://github.com/TutorialDoctor/Tumult-Hype-Projects/blob/master/Projects/paperJS/tadpoles/tadpoles.html
becomes
https://rawgit.com/TutorialDoctor/Tumult-Hype-Projects/master/Projects/paperJS/tadpoles/tadpoles.html
This is useful for demonstrating Hype projects hosted on Github.
Here is an example.
Here is the production link