The Gutenberg Youtube embed lacks a few things. The alignment doesn’t seem to be working, at least in the theme I’m using. I’m using Generate-Pro, a Genesis child theme. By default, it’s left-aligned. I have to add this div to make it centered.
<div style="text-align:center"> </div>
If you want right aligned, use this div.
<div style="text-align:right"> </div>