Amazon S3 video in Upfront:Parrot header background

Is there a way to embed an Amazon S3 video link in the header background on the Upfront:stuck_out_tongue:arrot theme? I get the YouTube background to work fine, but changing the link to an Amazon S3 public bucket does not embed. The S3 embed works properly inside a post…just not as an Upfront background (which seems to only recognize YouTube videos).

Thank you!