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 — an external R2 public bucket outside our control. It is now mirrored in the middlecache R2 bucket via the aus_mobile_video pipeline in middlecache-housekeeping.

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

⚠️ Rebase: AI conflict resolution stopped — confidence not high enough to auto-resolve.

Could not identify specific conflicting files. Please resolve manually.
⚠️ 2 warnings found in commit b3b5e39.

👉 Fix in your agent 👈

Fix the following review findings in PR #32588 (https://github.com/cloudflare/cloudflare-docs/pull/32588).

Before making changes, review each finding and present a brief summary table:
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  or the finding is factually incorrect), explain why
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After triaging, follow this order:
1. Post a comment on this PR for any findings you are skipping, with the finding ID and your reasoning.
2. Then commit the fixes for the legitimate findings.

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---

## Code Review

### Warnings (2)

#### CR-5b20563edd67 · Internal-only origin used in public-facing content
- **File:** `src/content/changelog/stream/2025-03-06-media-transformations.mdx` line 37
- **Issue:** The embedded <video> source and example URL point to https://middlecache.ced.cloudflare.com/v1/aus-mobile/aus-mobile.mp4. This is an internal Cloudflare domain, which may be unreachable for public readers and is not a stable public origin for documentation assets.
- **Fix:** Host the example MP4 on a public origin (e.g., in public/ or an R2/public bucket) or use a placeholder/example URL that readers can substitute with their own source video.

#### CR-833b8cc59bf0 · Internal-only origin used in public-facing content
- **File:** `src/content/changelog/stream/2025-03-06-media-transformations.mdx` line 42
- **Issue:** The example URL repeats the internal middlecache.ced.cloudflare.com origin, exposing the same public accessibility concern on another changed line.
- **Fix:** Use a public example source URL or a clear placeholder so the documented example remains reproducible for external users.

Code Review

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

Warnings (2)

File	Issue
changelog/stream/2025-03-06-media-transformations.mdx line 37	Internal-only origin used in public-facing content — The embedded
changelog/stream/2025-03-06-media-transformations.mdx line 42	Internal-only origin used in public-facing content — The example URL repeats the internal middlecache.ced.cloudflare.com origin, exposing the same public accessibility concern on another changed line. Fix: Use a public example source URL or a clear placeholder so the documented example remains reproducible for external users.

Conventions

_{No convention issues found.}

Style Guide Review

_{No style-guide issues found.}

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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