There is a New YouTube capture program called DVD VideoSoft.
To use it, you put a short cut of the YouTube link on your main screen, open the program, drag the link to the program box & hit record. The program then does a live capture of the YouTube Video. It is a great program, free and Legal(as far as I know). The only setback is that if the video stops to buffer(as with slow connections), then the captured video does the same.
You can check it out here.