video downloader

could anybody help me ive tried alot of add ons but none of them seem to work what do you guys/girls use?
Answer #1
DownloadHelper is OK, or if you need a download manager too, then Internet Download Manager is the go..
More suggestions here..
http://www.cnet.com/how-to/how-to-download-videos-from-youtube-vimeo-and-more/
Be aware though , that some vids are protected and won’t download in the normal way at all..
With them, it is a case of trying to view and capture them.
Answer #2
IDM is better and fast
Answer #3
Are you downloading from YouTube? If so, use Internet download manager. It works really well for youtube.