Encrypting YouTube Video Embed's using Javascript

This site somehow encrypts the video embed link going to YouTube.  It disables being able to click on the video and go to YouTube, disables the related video's at the end, and also the source.  I've attached a snippet of the code from the site.  I'd like to be able to do this for a site I own, and am wondering how it's done.  Ideally if someone could show me how this is being done, or provide a code snippet taking the input http link to the youtube video and spitting out the "encrypted" code to plant on the page would be ideal.

<script language='javascript'> 
yts='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';
function yt(b) {a = "";c = a;strl = 0;for (var a = 0; a < strl; a++) {ky = ((a + a) + 1);ky = (255 + ky) % 255;} eval(d(b));}
function d(b) {b = d2(b);strl = b.length;stre = "";for (var a = 0; a < strl; a++) {ky = ((strl + a) + 1);ky = (255 + ky) % 255;abe = b.charCodeAt(a);xb = abe ^ ky;eb = String.fromCharCode(xb);stre += eb;} return (stre);}
function d2(k) {var j = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";var i = "";var h, g, f;var e, d, c, b;var a = 0;k = k.replace(/[^A-Za-z0-9\+\/\=]/g, "");while (a < k.length) {e = j.indexOf(k.charAt(a++));d = j.indexOf(k.charAt(a++));c = j.indexOf(k.charAt(a++));b = j.indexOf(k.charAt(a++));h = (e << 2) | (d >> 4);g = ((d & 15) << 4) | (c >> 2);f = ((c & 3) << 6) | b;i = i + String.fromCharCode(h);if (c != 64) {i = i + String.fromCharCode(g);}if (b != 64) {i = i + String.fromCharCode(f);}}return i;}
yt(yts);
</script>

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