This is one of those extensions I downloaded thinking I'd probably never use it, but what the hell. I use it all the time. It has helped enhance different projects I've done, simply because I can download most videos from most sources. It gets a little wonky on some sites with some formats, but some sites are so junked up, it makes sense. I haven't had any major problems with it, and it's so easy to use. Definite five-star app.