If you are on youtube, and you click share, it says
This video is public.
40 views
Link to this video:
http://youtu.be/-4seQniD_uw
Uploaded by DarkJester2003 on Jan 3, 2011
no description available
2 likes, 0 dislikes
So it is an original youtube link..
Try it on any youtube video o.O;
I'll even replace them lol
-EDIT-
I went onto someone elses video link, you only have to do [ YOUTUBE ]-4seQniD_uw 'youtube ending'[ /YOUTUBE ]