changelog: serve aus-mobile.mp4 from middlecache

[mvvmm]

What

Updates the Media Transformations changelog to reference the aus-mobile.mp4 video from middlecache instead of the external R2 public bucket.

Why

The video was previously served from pub-d9fcbc1abcd244c1821f38b99017347f.r2.dev.

Changes

• src/content/changelog/stream/2025-03-06-media-transformations.mdx
  • <video> source URL: pub-d9fcbc1abcd244c1821f38b99017347f.r2.dev/aus-mobile.mp4 → middlecache.ced.cloudflare.com/v1/aus-mobile/aus-mobile.mp4
  • Example URL in code block: same replacement

[cloudflare-docs-bot]

Review

✅ No outstanding issues in commit 7ccf6b8.

Code Review

This code review is in beta and may not always be helpful — use your judgment.

_{No code review issues found.}

Conventions

_{No convention issues found.}

Style Guide Review

_{No style-guide issues found.}

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Acknowledged by author (4)

Review	File	Issue	Note
Code	changelog/stream/2025-03-06-media-transformations.mdx line 37	Internal infrastructure exposed in public docs	The author says that middlecache.ced.cloudflare.com is a public custom domain on the middlecache R2 bucket and is reachable by any reader.
Code	changelog/stream/2025-03-06-media-transformations.mdx line 42	Internal infrastructure exposed in public docs	The author says that middlecache.ced.cloudflare.com is a public custom domain on the middlecache R2 bucket and is reachable by any reader.
Code	changelog/stream/2025-03-06-media-transformations.mdx line 37	Internal-only origin used in public-facing content	The author says that middlecache.ced.cloudflare.com is a public custom domain on the middlecache R2 bucket and is reachable by any reader.
Code	changelog/stream/2025-03-06-media-transformations.mdx line 42	Internal-only origin used in public-facing content	The author says that middlecache.ced.cloudflare.com is a public custom domain on the middlecache R2 bucket and is reachable by any reader.

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[mvvmm]

Skipping CR-5b20563edd67 and CR-833b8cc59bf0

Both findings flag middlecache.ced.cloudflare.com as an internal-only origin. It is not — the domain is a public Cloudflare custom domain on the middlecache R2 bucket and is publicly accessible:

$ curl -sIL https://middlecache.ced.cloudflare.com/v1/aus-mobile/aus-mobile.mp4
HTTP/2 200
content-type: video/mp4
content-length: 28978866

The ced subdomain references the Content Engineering team that owns the bucket, but the URL is stable and served to any public reader. If a cleaner public domain name is desired, that is a separate infrastructure task (new R2 custom domain) outside the scope of this content change.

[mvvmm]

/rebase

[mvvmm]

/rebase

[github-actions]

This pull request requires reviews from CODEOWNERS as it changes files that match the following patterns:

Pattern	Owners
/src/content/changelog/	@cloudflare/pm-changelogs, @cloudflare/product-owners, @hoan-pom

[github-actions]

Preview URL: https://7ccf6b8c.preview.developers.cloudflare.com
Preview Branch URL: https://aus-mobile-middlecache.preview.developers.cloudflare.com

Files with changes (up to 15)

Original Link	Updated Link
https://developers.cloudflare.com/changelog/post/2025-03-06-media-transformations/	https://aus-mobile-middlecache.preview.developers.cloudflare.com/changelog/post/2025-03-06-media-transformations/