YouTube ~ get video thumbnail (just image)

this is the video


video link
http://www.youtube.com/watch?v=cPvR4u0b9II


get video thumbnail

<img src="http://img.youtube.com/vi/cPvR4u0b9II/0.jpg" />


<img src="http://img.youtube.com/vi/cPvR4u0b9II/1.jpg" />


<img src="http://img.youtube.com/vi/cPvR4u0b9II/2.jpg" />


<img src="http://img.youtube.com/vi/cPvR4u0b9II/3.jpg" />



http://code.google.com/intl/zh-TW/apis/youtube/2.0/developers_guide_protocol.html