Blog home page error for video post: DOMDocument::loadHTML

Error message on blog home page teaser for video post (youtube video). Actual post does not display this error message.

How can I get rid of this?

Warning: DOMDocument::loadHTML() [domdocument.loadhtml]: Attribute flashvars redefined in Entity, line: 5 in /home/content/65/9558965/html/wp-content/themes/esplanade/functions.php on line 1626

Warning: DOMDocument::loadHTML() [domdocument.loadhtml]: Attribute allowfullscreen redefined in Entity, line: 5 in /home/content/65/9558965/html/wp-content/themes/esplanade/functions.php on line 1626