Step 1 - Go to www.youtube.com and find the video you want to download.

Step 2 - Once you have found your video, copy and paste the URL into the box
                ( URL example: http://www.youtube.com/watch?v=7IbYJoWrOIg ) now click the box "Get download link"

Step 3 - Wait a minute if it's loading, once it's ready a link will appear and simple click to download.

Step 4 - If you have 'FLV Player' installed on your computer than you've completed the download.
               If not, you must download and install this software. This will allow to you watch your downloaded videoes.