I was thinking of this a few times....
...wouldn't it be possible to make preset "embed" settings for several VideoPortals in the shadowbox.js file?
so you just have to make something like this for implementing a movie (pseudo code):
*a rel="shadowbox;width=405;height=340;options={youTube}" class="option" title="David Beckham" href="
http://www.youtube.com/v/wbzLpteC8ng&autoplay=0">YouTube
or even some auto scan of the URL .... "if URL =
http://www.youtube.com/etc.....
then use the youTube embed code
else
use Google Video embed code
etc.
etc.
...well, just thinking