The ID is the part AFTER the = and BEFORE the & (if there is one)
So the ID that you enter from the URL above would be: uu3TiqmQ9Ec
Just copy that portion from the URL and paste into the dialog box.
Also, you have to put something in between the brackets - ][ - where the cursor is after it enters the code in your post, or it won't show up. That text is what shows up in the blue part at the top. A lot of people just put a period. A space won't work.
And... here's the video from the above URL. It's one of my all time faves.
"And I know I was wrong when I said it was true,
that it couldn't be me and be her in between without you."
Wow, what a brilliant and contorted way to explain away a love triangle.
[YOUTUBE="uu3TiqmQ9Ec"]In Between Days[/YOUTUBE]
Edit: Yeah, I know he's lip syncing, but I think he made it obvious, rather than trying to trick us. He dances far away from the mic repeatedly, and they didn't really have headsets back then (1985), so I think everybody knew he was lip syncing and nobody cared, especially Robert Smith.
Plus, this video is from "Top of the Pops," which as I understand it as an American who used to read NME.com (New Musical Express) back in its early days when it was just a magazine, TOTP was Britain's version of our "American Bandstand," except better.
Love the set and the people dancing on those stairs. It was a just a big silly electronic party everywhere in the 80s.