diff --git a/packages/components/CHANGELOG.md b/packages/components/CHANGELOG.md
index a6020c19660eae..8f3c7c4eb10293 100644
--- a/packages/components/CHANGELOG.md
+++ b/packages/components/CHANGELOG.md
@@ -38,6 +38,7 @@
 -   `BorderControl`, `BorderBoxControl`: Stop offering `%` as a width unit, since `border-width` does not accept percentages. A width already set in `%` keeps showing its unit ([#83492](https://github.com/WordPress/gutenberg/pull/83492)).
 -   `UnitControl`: After clearing a value whose unit is not in `units`, give the next typed value the unit shown in the select instead of the cleared one ([#83492](https://github.com/WordPress/gutenberg/pull/83492)).
 -   `ResizableBox`: Update `re-resizable` to `6.11.2`, which supports React 18 and renders the top and left handles before the content so focus order matches visual order ([#83754](https://github.com/WordPress/gutenberg/pull/83754)).
+-   `SandBox`: Send the page URL as the referrer from iframes inside `allowSameOrigin` sandboxes in Safari, fixing embed previews that require a referrer, such as YouTube's "Error 153" ([#84014](https://github.com/WordPress/gutenberg/pull/84014)).
 -   `PaletteEdit`: Keep an item's slug when it is renamed, so blocks and styles that reference the preset keep working ([#83750](https://github.com/WordPress/gutenberg/pull/83750)).
 -   `FocalPointPicker`: End a drag when the pointer is released outside the control, including over the editor canvas ([#83348](https://github.com/WordPress/gutenberg/pull/83348)).
 -   `ContentEditableControl`: Keep a disabled field focusable (out of the tab order), so a field disabled while it has focus keeps it instead of dropping focus on the body ([#84083](https://github.com/WordPress/gutenberg/pull/84083)).
diff --git a/packages/components/src/sandbox/index.tsx b/packages/components/src/sandbox/index.tsx
index 4257cfc7ea28b2..214d46b5614eba 100644
--- a/packages/components/src/sandbox/index.tsx
+++ b/packages/components/src/sandbox/index.tsx
@@ -437,6 +437,17 @@ function SameOriginSandBox( {
 		// was loaded over the network, so DOM creation and mutation, script
 		// execution, etc. all work as expected.
 		contentDocument.open();
+		// Nested iframes should send this page's URL as their `Referer`, which
+		// YouTube requires. Safari sends none after `open()` until the URL is
+		// set again with `replaceState()`. Firefox throws here but already
+		// sends the referrer. See https://bugs.webkit.org/show_bug.cgi?id=169846.
+		try {
+			contentDocument.defaultView?.history.replaceState(
+				null,
+				'',
+				window.location.href
+			);
+		} catch {}
 		contentDocument.write(
 			buildSandBoxDocument( {
 				html,
diff --git a/test/e2e/specs/editor/various/embedding.spec.js b/test/e2e/specs/editor/various/embedding.spec.js
index 06dd817b274a2e..0e7c7c2bd2b696 100644
--- a/test/e2e/specs/editor/various/embedding.spec.js
+++ b/test/e2e/specs/editor/various/embedding.spec.js
@@ -150,6 +150,33 @@ test.describe( 'Embedding content', () => {
 		).toHaveAttribute( 'title', 'Embedded content from cloudup.com' );
 	} );
 
+	// See https://github.com/WordPress/gutenberg/issues/73288.
+	test( 'should send a referrer from iframes inside embed previews @webkit', async ( {
+		page,
+		embedUtils,
+	} ) => {
+		await embedUtils.interceptRequests( {
+			'https://www.youtube.com/watch?v=lXMskKTw3Bc': {
+				...MOCK_EMBED_VIDEO_SUCCESS_RESPONSE,
+				html: '<iframe title="YouTube video" src="https://www.youtube.com/embed/lXMskKTw3Bc"></iframe>',
+			},
+		} );
+		const embedRequest = page.waitForRequest(
+			'https://www.youtube.com/embed/lXMskKTw3Bc'
+		);
+		await page.route( 'https://www.youtube.com/embed/**', ( route ) =>
+			route.fulfill( { contentType: 'text/html', body: '' } )
+		);
+
+		await embedUtils.insertEmbed(
+			'https://www.youtube.com/watch?v=lXMskKTw3Bc'
+		);
+
+		expect( await ( await embedRequest ).headerValue( 'referer' ) ).toBe(
+			`${ new URL( page.url() ).origin }/`
+		);
+	} );
+
 	test( 'should allow the user to convert unembeddable URLs to a paragraph with a link in it', async ( {
 		editor,
 		embedUtils,