GoogleChrome / GoogleChrome/lighthouse

Lighthouse flagging HLS video chunks as text content

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#14,259 5 comments 0 reactions 1 assignee Claimed by @brendankenny View on GitHub
bug needs-investigation
Dominant language
JavaScript
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Description

### FAQ

- [X] Yes, my issue is not about [variability](https://github.com/GoogleChrome/lighthouse/blob/master/docs/variability.md) or [throttling](https://github.com/GoogleChrome/lighthouse/blob/master/docs/throttling.md).
- [X] Yes, my issue is not about a specific accessibility audit (file with [axe-core](https://github.com/dequelabs/axe-core) instead).

### URL

https://hls-js.netlify.app/demo/?src=https://hls.enniscdn.net/ded3f0fb-0721-49bb-b761-2123d7be9ed7/master.m3u8&demoConfig=eyJlbmFibGVTdHJlYW1pbmciOnRydWUsImF1dG9SZWNvdmVyRXJyb3IiOnRydWUsInN0b3BPblN0YWxsIjpmYWxzZSwiZHVtcGZNUDQiOmZhbHNlLCJsZXZlbENhcHBpbmciOi0xLCJsaW1pdE1ldHJpY3MiOi0xfQ==

### What happened?

When running Lighthouse on a page with an embedded HLS video, the video chunks are incorrectly flagged as "text content". This seems false, especially as the chunks come back with `Content-Type: application/octet-stream`.

Screenshot 2022-08-03 at 14 00 24

They're also flagged as "enormous payloads". Are there any docs pointing to how best to chunk up video for playback? HLS/DASH seems best practise at the moment.

### What did you expect?

For Lighthouse not to interpret video chunks as text content.

### What have you tried?

_No response_

### How were you running Lighthouse?

Chrome DevTools

### Lighthouse Version

9.6.1

### Chrome Version

Chromium: 103.0.5060.114 (arm64)

### Node Version

_No response_

### OS

macOS

### Relevant log output

_No response_

Contributor guide

Open the contributing guide

Assessment

This issue has not been assessed yet.

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