Once the script will be launced, you'll spot YouTube Clipmon's little window appearing on the upper left corner of the screen, immediately followed by OWB, which will be opened straight to youtube.com.
Now interact with YouTube site as usual, looking for your favourite contents. When done, double click on the URL field of OWB and press rAROS+C to copy the address in the AROS clipboard. Immediately after, Clipmon will start streaming the YouTube video to MPlayer, which will be automatically launched a few seconds after. Enjoy your favourite videos!