I am doing that

Like I said it works for vimeo but not for youtube. It is strange. And driving me up the wall.

When I put just http://www.youtube.com/watch?v=NZTt5yiwS6Y I get the text showing, the embedding is not picking up

and when i put

<iframe src=//www.youtube.com/watch?v=NZTt5yiwS6Y” width=”500″ height=”281″ webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>

I get just a blank iframe.

I am doing the right thing aren’t I?