Fix for Refuse to connect error using iframe in html code

Fix for Refuse to connect error using iframe in html code; html code; java scrip; coding; css scripting;
use below code;
use angled brackets in starting and ending of iframe
iframe width="420" height="315"
src="ruclips.net/user/embedt0Q2ots..."
/iframe

[@saifkhalid4522]

what about website other than youtube? how to embed website link?