Works well for most video sites Rated 5 out of 5 stars
This is an excellent add-on which is very good at what it does. For most video sites it makes downloading very easy.
2 very small quibbles:
(1) It does not work with Dailymotion.com. The files that it finds are not correct. This is a problem with almost all other video downloaders that I have tried. Apparently Dailymotion does something non-standard. There is one service that works with Dailymotion: www.savevideo.me.
(2) "Download Flash & Video" normally uses Firefox's internal file-save functionality to download files. It can be configured to use the extension Down Them All as alternative. However, once in awhile it randomly "forgets" to launch DTA, and reverts to the internal file manager. I don't know whether the problem is with FNV or with DTA.