okay if this is the embed code:
<iframe title="YouTube video player" width="640" height="390" src="http://www.youtube.com/embed/NTMNvEqDfz4" frameborder="0" allowfullscreen></iframe>
what should i cut out?
Don't use the embed. Use the actual address of the video. This is the one you would use: http://www.youtube.com/watch?v=NTMNvEqDfz4
Copy the stuff after "=", or "NTMNvEqDfz4"
and paste it after you hit the Youtube icon. It comes out like this: