Как вставить iframe в новости?

<iframe src="https://streamable.com/s/lownv/isztfk" frameborder="0" width="100%" height="100%" allowfullscreen style="width: 100%; height: 100%; position: absolute;"></iframe>

	var $allowed_domains = array("vkontakte.ru", "ok.ru", "vk.com", "youtube.com", "maps.google.ru", "maps.google.com", "player.vimeo.com", "facebook.com", "dailymotion.com", "bing.com", "ustream.tv", "w.soundcloud.com", "coveritlive.com", "video.yandex.ru", "player.rutv.ru", "promodj.com", "rutube.ru", "skydrive.live.com", "docs.google.com", "api.video.mail.ru", "megogo.net", "mapsengine.google.com", "google.com", "videoapi.my.mail.ru", "coub.com", "music.yandex.ru", "rasp.yandex.ru", "mixcloud.com", "yandex.ru", "my.mail.ru", "icloud.com", "codepen.io", "streamable.com");