I wish there was a way to explain what I'm try to do more clearly.
It looks like Youtube.com is smart enough to not allow a static URL to access a video stream file more than a couple of times. Otherwise, it would be too easy. Im sure the URL would change pretty quicky. So, it doesnt even seem feasible to expect some kind of magic URL pointing to the every time. If there is, I haven't found a way to do that yet.
I am hoping someone was able to make a Windows command-line tool which can convert friendly short youtube URLs to a "direct" long URL to the file. Basically what the bookmarket above does, except in a self contained command-line app.
If there as a command-line converter that converted URLs like this:
http://www.youtube.com/watch?v=6QRKvM27Gxc
to
http://r16---sn-p5q7ynee.c.youtube.c...4DE5B4DF40314D
That would be great! Hopefully, Im not the only person who wants to do something like this.