I want to embed video on my website, but protect the direct url to the videos to keep users from sharing the movies. As you see here: http://www.amazon.com/gp/music/wma-pop-up/B00004T9VG001001/ref=mu_sam_wma_001_001/105-4106382-4822800 in the source of the file the link to the audio looks like this. <PARAM name="URL" value="/gp/music/clipserve/B00004T9VG001001/0/105-4106382-4822800"> PHP: Instead of <PARAM name="URL" value="/gp/music/clipserve/B00004T9VG001001/0/music1.wmv"> PHP: How does this work?