Figcaption doesn't become translation ready #735
Description
Sample markup
<!-- wp:video {"id":158} -->
<figure class="wp-block-video"><video controls src="<?php echo esc_url( get_stylesheet_directory_uri() ); ?>/assets/videos/tennis_video.mp4"></video><figcaption class="wp-element-caption">Rewatch one of the biggest matches in history.</figcaption></figure>
<!-- /wp:video -->
The string Rewatch one of the biggest matches in history. stays as is after saving the theme.