I've been told by the theme author that i need to add the following piece of CSS to ensure video plays at 100% of the thumbnail rather than as it does presently (in chrome and ie9) shrink to a tiny player when one triggers the video to start. The CSS to be added is:
Where should I add this? I have added it to the basic CSS dialog window offered to me in the customisation view, but it doesn't seem to make any difference.
The blog I need help with is samdoust.com.