Using DesignerPro.

I drag and MP4 file onto the page.
The player interface appears and the movie plays fine,

Then I take a screen capture of the 1st frame of the movie and place it behind the player interface.

When the viewed IE, the screen capture image is seen when the page is navigated to and the movie plays when clicking on the "arrow" icon of the player.

When viewed in Chrome the screen capture image is NOT displayed. The movie does play, however.

Is this a known issue? Is there some setting in Chrome to prevent this?