First copy the youtube URL from the address bar Click the one outlined in red: above the editor: Paste the youtube URL into the address bar: System should give an address in the editor once you click done
As Marcus says just paste the YouTube address into the icon that looks like a FilmStrip. Then click preview post to see if you have done it right. Odd with this one I didn't notice the gun till half way through. [video=youtube;PtQNnlQLlwk]http://www.youtube.com/watch?feature=fvwp&NR=1&v=PtQNnlQLlwk[/video]