Hi Brantley,
The embedded iframe not being set to be responsive for mobile viewport is the cause of the issue.
You can modify your embedded video to become responsive by trying this code.
<div style="position:relative; width: 100%; overflow: hidden; padding-top: 56.25%;">
<iframe src="https://player.vimeo.com/video/456737242" frameborder="0" allowfullscreen="allowfullscreen" style="position: absolute; top: 0; left: 0; bottom: 0; right: 0; width: 100%; height: 100%;"></iframe>
</div>
You can also get the responsive embed code directly from Vimeo by selecting Size:Responsive shown here.
https://share.getcloudapp.com/p9uG9EZq
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