How to download Youtube files (.flv files)

Easier but possibly longer version

Go to ConvertTube and paste the whole url (web site name) of the youtube video. Use quicktime, hit the button, wait for it to process, then hit download to save to desktop.

Quicker but more complicated version

It's simple to download .flv files using a browser like Safari.
Visit the page and initiate the page load by clicking Play on the video.
Open the Safari Activity window (window - activities on the upper toolbar)when the file starts its download and double click on the page element that has "get video" in its name (usually near the top of the list and large file size).
Open your Downloads folder and control - click on this get video.flv then "Open With..." and choose QuickTime Pro.
QuickTime Pro can now open and export these Flash Video files.
Slect the whole video and export as a Quicktime Movie (Final Cut cannot open a .flv on its own)