Download YouYube Videos with KeepVid: here's how

https://youtube.com/watch?v=Ilvcg8PLpVI

"Published on Aug 20, 2013
THIS TUTORIAL IS BEST FOR FIREFOX BROWSER
Keepvid is a great tool but you have to be very careful not to click the sponsors links otherwise you'll end up infecting your machine with spy-ware...
Here is my instruction on how to get through the minefield.
Only download non copyright materials from youtube! ;-)

how to download video - how to download youtube - how to save youtube"

Informs of what to watch out for regarding download of vids with keepvid software.

Yes Keepvid is good I can vouch for that

Another option for downloading YouTube videos is ClipConverter which gives the option of converting the file to 11 different file formats before downloading
(You can also convert your own files with 140 formats supported by using dropbox/google drive or simply by dragging and dropping files onto the page)
Free to use and no software needed to download

http://www.clipconverter.cc/

i personally love keepvid. i am able to save many videos to watch later.

There is also a simple add-on that you can use with Firefox called 'Download helper' for youtube.. and other vids.
Just click on (top of FF screen) the 'Tools' button > add ons and type in Download helper in the add ons search box.

download any video anywhere online with FlashGot. I use Firefox, FlashGot installs its own download button on the menu bar/shelf. I've never had trouble downloading any video file on any video player or website I've encountered.