I normally use Downloadhelper to download you you clips. However when i downloaded a new version of firefox, in the tools add-ons it isnt there. Even, if i visit the downloadhelper site it refers to go to firefx add-ons
I woulde grateful if you could help find a simalar easy to use software so that i can down load clips from youtube.
Freemake Video Downloader is my preference, not only can you download YouTube, it also works with Vimeo and many other websites. An editor is included where you can delete parts of a clip you don't require.
Freemake also provides other useful tools such as a video converter and audio converter.