- Add any still image to the gallery where you have the video
- In the style page set the content size to large (to make it load faster) and the rotate time to 0
- Make sure that the image comes before your video in the order page
- You can also add a still image after the video and add a call-to-action message like "click next to buy".
For example : http://www.cincopa.com/wpplugin/test.aspx?fid=10564669