List Formatting: Question about embeddable sites using the `embed` action

[tecchan1107]

What type of issue is this?

Question

What SharePoint development model, framework, SDK or API is this about?

Declarative list formatting

Target SharePoint environment

SharePoint Online

What browser(s) / client(s) have you tested

• [ ] 💥 Internet Explorer
• [X] 💥 Microsoft Edge
• [X] 💥 Google Chrome
• [ ] 💥 FireFox
• [ ] 💥 Safari
• [ ] mobile (iOS/iPadOS)
• [ ] mobile (Android)
• [ ] not applicable
• [ ] other (enter in the "Additional environment details" area below)

Additional environment details

No response

Issue description

When using the embed action, you can embed and display a site specified in the src attribute's URL.

However, there are sites that can and cannot be embedded. For example, you can embed https://www.youtube.com/embed/pwnW68PN2sU?si=rzigqVDQSCHTi0pB, but you cannot embed https://www.youtube.com/watch?v=pwnW68PN2sU.

Is this determination based on the value of the X-Frame-Options property of the site specified in the src attribute?