As you can see here https://mohamed-hassan.com/samples/project24/ ,if you open the console you will see this error
(ZYLR4KocS2Q?enablejsapi=1&autoplay=1&mute=1&controls=0&showinfo=0&modestbranding=1&rel=0:1 Failed to load https://googleads.g.doubleclick.net/pagead/id: Redirect from 'https://googleads.g.doubleclick.net/pagead/id' to 'data:text;charset=utf-8,' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://www.youtube.com' is therefore not allowed access.)
I just embedded video from youtube using iframe tag and I added at the top of the index file header('Access-Control-Allow-Origin: *'); but still get this error.
Here is a screenshot