# YouTube URIs fail to render thumbnails when oneboxed

**URL:** https://meta.discourse.org/t/youtube-uris-fail-to-render-thumbnails-when-oneboxed/387673
**Category:** Bug
**Tags:** composer, onebox
**Created:** [November 5, 2025, 2:07pm UTC](https://meta.discourse.org/t/youtube-uris-fail-to-render-thumbnails-when-oneboxed/387673 "2025-11-05T14:07:47Z")
**Posts on this page:** 1
**Showing post:** 14

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### Author: ![martin](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/martin/32/491371_2.png) [@martin](https://meta.discourse.org/u/martin)
#### Post date: [November 12, 2025, 5:19am UTC](https://meta.discourse.org/t/youtube-uris-fail-to-render-thumbnails-when-oneboxed/387673/14 "2025-11-12T05:19:52Z")

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Okay with that fix merged, this is working now 🙂

[![](https://global.discourse-cdn.com/meta/original/4X/e/0/5/e05d3c1661f7f0051aa4a8a0dfe5fe17772f74d2.jpeg "A Screencast Of LinkedIn Persona Verification Failure") ](https://www.youtube.com/watch?v=Cs3sTnLO6EE)

Note that onebox URL responses are cached for 1 day, I had to do this in the console `Oneboxer.preview(“https://youtube.com/shorts/Cs3sTnLO6EE”, invalidate_oneboxes: true)` to see the new result.

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