Share this with Wistia … and my solution:

Remove the outside divs that are in the default because the 80% padding causes weird issues. Then get the height of the video and add that as the “max-height” for the video — this is especially important on a size with videos of different sizes. Use the max height instead of just height: 100%;

<div class="wistia_embed wistia_async_ videoFoam=true" style="max-height:;width:100%">