Music Video & Movies screen size

The new iTunes only appears to play Music Videos & Movies in 'Full Screen' mode when played in the iTunes browser. The problem with this is that this isn't good for all videos and movies, and can give some of them that need to viewed at a smaller size a worse screen resolution.

In order to be able to watch brilliant quality music videos and movies on iTunes I have too set the preferences for 'Playback' in a 'separate window' outside the browser. I would prefer to watch music videos, movies and video podcasts in the browser. The last few generations of the iTunes player used to have an option of watch videos etc in 3 difference sizes, small, medium and full screen. Is this option gone, or is it hidden somewhere.