Imgur GifV MP4 Downloader is a ultralight Google Chrome extension allowing you to download imgur Gifv files as a MP4 on your device.
Download the extension from the Chrome Webstore.
I made this Google Chrome extension because I wanted to learn how it was done. It's basically a JavaScript injection that allow you to download the MP4 file from a webpage that contain a Imgur Gifv.
Feel free to contribute / fork or edit my code.