Downloading youtube movies on Macs

I have just come across an easier way to download youtube movies on a Mac. This works only in Safari. As the movie is playing press Option - Command - A and an address window will open.
Click on the arrow next to the Movie File name to view all the files.
Double click on the biggest file and it will start downloading to your Download folder in your folder. The download file will be called get_video. Open your VLC player,
Go to File - Open and open your movie and it will play.