How to stop iframe autoplay?

@elise_daugherty 

To stop iframe autoplay, you can add the autoplay="false" attribute to the iframe tag. Here's an example of how you can do this:

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<iframe src="https://www.example.com/video.mp4" width="560" height="315" frameborder="0" allowfullscreen allow="autoplay; encrypted-media" autoplay="false"></iframe>

By adding autoplay="false" to the iframe tag, the video will no longer autoplay when the page loads.