<https://forum.squarespace.com/topic/167183-video-resize-in-header-when-converting-to-mobile-view/#comment-450427>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://forum.squarespace.com/topic/167183-video-resize-in-header-when-converting-to-mobile-view/?tab=comments#comment-454228>