iframe not showing on website after publishing

My iframe works well in the development environment. But after publishing the iframe is not working. I have attached the code.

<iframe id="ytVideo" src="https://www.youtube.com/embed/XACzyRmQm54"></iframe>
    
    <script type="text/javascript">
document.getElementById("card1").onclick = function() {
    document.getElementById('ytVideo').src = 
    "https://www.youtube.com/embed/XACzyRmQm54";
};
document.getElementById("card2").onclick = function() {
    document.getElementById('ytVideo').src = 
    "https://www.youtube.com/embed/v5pg_Nw1lak";
};
document.getElementById("card3").onclick = function() {
    document.getElementById('ytVideo').src = 
    "https://www.youtube.com/embed/4fZU39FM-zg";
    
};
document.getElementById("card4").onclick = function() {
    document.getElementById('ytVideo').src = "https://www.youtube.com/embed/fZftnqXlU4g";
    
};
</script>


Read more here: https://stackoverflow.com/questions/66331848/iframe-not-showing-on-website-after-publishing

Content Attribution

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