Video appears in the preview, but not in the actual browser

My page has a link to a YouTube video in its code. In the Elementor preview, the video appears and works normally, but when I actually open the page in the browser, there’s only an empty space where the video should appear. I tested embedding a link to another video, but the problem persists. I also cleared the browser cache, tested it with other browsers, and on different devices. Another test I conducted was copying the HTML code, pasting it into a text editor, saving it with the .html extension, and opening it afterward, and this way everything worked fine. Could you help me?

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