not sure why there's good amount of 1 stars to this add on, it's really good, sometimes it doesn't show the video cause it is not played yet, as soon as you start the video you can download it :)

Great addon! I had to download several courses and it worked great!

Great addon, it really saved my life! haha I needed to download some important classes.

Nice

This is the one of best. Because I downloaded 5 popular tools on video downloading from here to download video from a website. The site has so restriction to prevent the video from download. IDM integration, Chrome Extension tools, Developers tools to find downloadable link, all were failed. No one able to capable to download. But this tool also failed to download but its show a tricks in a pop-up window over the video content. "about:config" to change some option. I change accordingly and Allah's!!! I got downloaded the video after 4Hrs of try. Thanks a lot for the whole developer team.

jammer dat je niet de full HD in kunt stellen -;)

This is best general vid downloader for Firefox. I find that it can download from a lot of websites other than just youtube. IMO it's working much better even than the top rated vid download add-ons.