Issue #3475695 by joshua1234511, richardgaunt, sime, toby-wild: civictheme_media_get_variables not returning anything for civictheme_remote_video media type

Issue #3475695 by joshua1234511, richardgaunt, sime, toby-wild: civictheme_media_get_variables not returning anything for civictheme_remote_video media type #6487