how to target an animated video preview using Ruby and web driver

On this webpage http://ift.tt/2qPfNoz.

The video appears to be playing but not in full until the play button is clicked on. But I want to target the video and be able to add this to my script but there are instances where there are more than one in a webpage e.g.http://ift.tt/IfXH0b, if you scroll down the page.

Any assistance will be greatly appreciated thanks