I don't think this is on any sites yet but I could be wrong. It's from the Nintendo Press Kit :P
http://www.scrollsoflore.com/warlock/GCN_Zelda_1.zip
Don't kill my bandwidth 😃
P.S. - this is *not* the video from the press conference. It's different.
Edit: Ok it's on GameSpot but this is much better quality :P