Simply include both frame-grab.js, the RSVP promise library, and a source video on your page. See the index.html file in the test directory for a simple example. Please note that, while frame-grab is functional, it is not yet complete. See the issue tracker for information and progress on upcoming features.
Frame-grab will not work in IE9 and older, or anything older than Safari 5.1. Every other modern browser should, in theory, work just fine. If you run into issues, please file an issue.
See the API documentation page.
See some code examples that describe various uses of frame-grab on the examples documentation page.