YouTube blocks not showing up on published posts

We have a site where we have styled the blog posts with a Single Layout and when we use the YouTube video block, it shows up just fine in the editor, but never displays on the front end.

If I use an HTML block and do the iframe code, it works…sort of. It displays very small.

I have tried to change themes and it works with one of the default WordPress themes, so I know that the issue is Pro theme but I can’t figure out what.

The link to the page is here: https://advocacyoffice.utah.gov/video-links/understanding-the-utah-trust-system/

I am also attaching a screenshot of what it looks like in the editor.

The top block is the one that shows up on the front end (but not well).

Any guidance or insight that you could offer would be much appreciated. Thank you!