Embed YouTube video to play HD720 by default

Want to embed YouTube and set its default to HD 720, not auto.
<iframe width="241" height="136" src="https://www.youtube.com/embed/NMG0CMkuUnA?version=3&vq=hd720"
frameborder="0" allowfullscreen></iframe>
Somehow this does not work.
How to make the YouTube to play at HD720 by default, not auto.
drupal_100Asked:
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Dan CraciunIT ConsultantCommented:
Not sure how you can play a 1280x720px movie inside a 241x136px window.

HTH,
Dan

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