Video block controls do not display correctly in the new eZDemo interface.

Steps to reproduce:

1. Create a 'Video' object with, for example, and mp4 video.
2. Edit the eZDemo frontpage and add a 'Video' block with the newly created Video object
3. Verify that, accessing the front-page, the video player controls are not correctly laid out or styled. Verify that the video plays if you click it.