Html iframe error

I’m a newbie and when trying to use iframe to add video to an item, from a 3rd party source, I get the following error message:
Screenshot 2024-11-26 at 3.58.39 PM
Screenshot 2024-11-26 at 3.58.57 PM
What is causing this error? Can someone point me to some iframe code known to function? The HTML purifier is disabled.

Could be that the video you’re trying to embed is set to restrict embedding elsewhere. YouTube has a feature that lets video uploaders do this, and I believe it can be applied to some videos on YouTube which contain copyrighted content.

Thanks! It was a permission problem.