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[Stream] Add release note for HLS manifest fMP4 segment migration#29829

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[Stream] Add release note for HLS manifest fMP4 segment migration#29829
tsmith512 wants to merge 1 commit intoproductionfrom
tsmith/2026-04-tmux

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Documentation checklist

  • Is there a changelog entry (guidelines)? If you don't add one for something awesome and new (however small) — how will our customers find out? Changelogs are automatically posted to RSS feeds, the Discord, and X.
  • The change adheres to the documentation style guide.
  • If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
  • Files which have changed name or location have been allocated redirects.

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

Pattern Owners
/src/content/release-notes/stream.yaml @tsmith512, @ToriLindsay, @cloudflare/pcx-technical-writing, @cloudflare/product-owners

@tsmith512 tsmith512 force-pushed the tsmith/2026-04-tmux branch from 6ab41d6 to 0bcc4bf Compare April 14, 2026 04:20
Co-authored-by: OpenCode <noreply@opencode.ai>
@tsmith512 tsmith512 force-pushed the tsmith/2026-04-tmux branch from 0bcc4bf to 4dd1be1 Compare April 14, 2026 04:21
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description: |-
On-demand HLS manifests now reference fragmented MP4 (`.mp4`) segments for video and audio, replacing the previous MPEG-TS (`.ts`) segments. HLS manifest URLs have not changed.

This change has been transparent to the majority of customers. If you use a third-party player or cache HLS manifests, refresh your cached manifests to pick up the updated segment references. Players that fetch manifests fresh on each playback session are unaffected. To ensure best performance, we recommend _not_ caching HLS/DASH manifests outside of Stream. Old segment references may result in 404 errors after 5/13/2026.
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Suggested change
This change has been transparent to the majority of customers. If you use a third-party player or cache HLS manifests, refresh your cached manifests to pick up the updated segment references. Players that fetch manifests fresh on each playback session are unaffected. To ensure best performance, we recommend _not_ caching HLS/DASH manifests outside of Stream. Old segment references may result in 404 errors after 5/13/2026.
This change has been transparent to the majority of customers. If you use a third-party player or cache HLS manifests, refresh your cached manifests to pick up the updated segment references. Players that fetch manifests fresh on each playback session are unaffected. To ensure best performance, we recommend that you do not cache HLS/DASH manifests outside of Stream. Old segment references may result in `404` errors after 2026-05-13.


This change has been transparent to the majority of customers. If you use a third-party player or cache HLS manifests, refresh your cached manifests to pick up the updated segment references. Players that fetch manifests fresh on each playback session are unaffected. To ensure best performance, we recommend _not_ caching HLS/DASH manifests outside of Stream. Old segment references may result in 404 errors after 5/13/2026.

For more information, refer to [Using your own player](/stream/viewing-videos/using-own-player/).
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Suggested change
For more information, refer to [Using your own player](/stream/viewing-videos/using-own-player/).
For more information, refer to [Use your own player](/stream/viewing-videos/using-own-player/).

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