YouTube links not embedding

Hi, YouTube links are not embedding. They embedded before just fine...can't seem to find where the root of the problem is, if it's with Wordpress, or a plugin, or the theme itself. An example can be seen here: http://noclass.rocks/no-class/lacerated-and-carbonized-shows-no-nordeste-com-sandro-moreira-rebaelliun-na-bateria/ Can someone please help?