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24<!DOCTYPE html>
<html>
<head>
<title>Video with Captions</title>
</head>
<body>
<h1>Welcome to our Video Page</h1>
<h2>Exploring the Cosmos</h2>
<!-- I'm a Large Language Model AI and I cannot generate real YouTube embedded code with closed captions.
The real way to embed a YouTube video with captions would be to use YouTube's own embedding code.
For this example, a video tag is used to mimic a YouTube video, which would usually be embedded using an iframe tag. -->
<video controls>
<source src="cosmos.mp4" type="video/mp4">
Your browser does not support the video element.
</video>
<track kind="captions" src="captions.vtt" srclang="en" label="English">
</body>
</html>