This extension will allow users to capture short (3-5 second) videos of themselves, which are then encoded as animated GIFs client-side, and then uploaded and embedded into a comment on a code review.
The extension is now fully implemented for pop-over comments.
The gif.js library and worker (which are excluded from review) can be found here: https://github.com/jnordberg/gif.js/tree/master/dist

They should be placed in \static\js\lib\gif.js and \static\js\lib\gif.worker.js

Test comments were posted on dummy reviews

Tried canceling out of recording in both preview and recording states by clicking cancel, unchecking and rechecking Enable Markdown

Tested extension functions in Chrome, Edge, and Firefox