I really want to have digitgrade legs for khajiits like the snowy digitgrade khajiit mod on youtube. No link, sry. If someone could at least give me a basic idea on what to do, or know of any mod that does that, i would be grateful.

Mod wise:
http://www.tesnexus.com/downloads/file.php?id=25827
http://www.tesnexus.com/downloads/file.php?id=31373

Goes hand to hand with one of these resource scripts if one is planning on making it for other races:
http://www.tesnexus.com/downloads/file.php?id=14326
http://www.tesnexus.com/downloads/file.php?id=33521

The one on Youtube you're refering too is probably http://www.tesnexus.com/downloads/file.php?id=27957. I don't think he's ever released them.