[youtube http://www.youtube.com/watch?v=5ZIxFd5I280?rel=0&showinfo=0&w=420&h=315]
When the file is displayed the width and height are as follows:
[youtube http://www.youtube.com/watch?v=5ZIxFd5I280&w=1190&h=893]
The above code came from the "copy embedded code" option when your right click on the youtube file. Can you provide a solution get the width/height selected?