YouTube blocks do not render inside of reusable blocks

[cagrimmett]

Description

When a YouTube block is inside of a resuable block, it only renders as a link on the front-end rather than the embedded video. The same video renders just fine outside of the reusable block.

Step-by-step reproduction instructions

1. Create a new post.
2. Add any public YouTube video as a YouTube block.
3. Make that block a reusable block.
4. Publish and view the post.
5. The video only renders as a link, rather than the embedded video.

Screenshots, screen recording, code snippet

Environment info

• WordPress 5.8.2
• Issue happens with and without the Gutenberg plugin running
• All themes

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[NewYorkerLaura]

Upon further testing the identical issue also arises in the following blocks:

• Vimeo Block
• Embed Block

[Mamaduka]

I am closing this as a duplicate of #14608.