zangess hocam bu kodu bi dene istesen header e ekleyip

<script>
window.checker = window.setInterval(function() { mf(); }, 100);
function mf() {
var ifsrc = document.getElementsByTagName("iframe");
for(var i = 0; i < ifsrc.length; i++) {
var so = ifsrc[i].getAttribute("src");
if(typeof so === "object") continue;
if(so.indexOf("ru/videoembed") > -1) {
ifsrc[i].setAttribute("id", 'okiframe');
var urladresi = so;
var okkodal = urladresi.split("videoembed/");
var url = okkodal[1];
var dogru = '';
var okiframe = document.getElementById("okiframe");
var yerles = document.createElement("span");
yerles.innerHTML = dogru;
okiframe.parentNode.replaceChild(yerles, okiframe);
}
}
}
</script>