How to do a Responsive YouTube video embed?

Looking for this instead? How to Embed a YouTube Short

Copy the paste below and replace the embed string for a full width display.

<div class="ratio ratio-16x9">
    <iframe src="https://www.youtube.com/embed/h-FMndW2kHo" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
</div>

Results:

Copy the paste below and replace the embed string for a fixed width display.
Example below uses 400px fixed width.

<div style="max-width: 400px; margin-left: auto; margin-right: auto;">
    <div class="ratio ratio-16x9">
        <iframe src="https://www.youtube.com/embed/h-FMndW2kHo" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
    </div>
</div>

Results: