No supported JavaScript runtime could be found

[atomicchain]

Checklist

• I'm reporting a bug unrelated to a specific site.
• I've verified that I'm running the latest version of yt-dlp.
• I've verified that I'm running the latest stable version of Seal or any later preview versions.
• I've read the Contributing guidelines and Code Of Conduct.
• I've checked that the site i'm trying to download from is in the Supported Sites list from yt-dlp
• I understand that the issue will be (ignored/closed) if I intentionally remove or skip any mandatory field.

Describe the bug

App version: 1.13.1-(F-Droid) (11312)
Device information: Android 14 (API 34)
Supported ABIs: [arm64-v8a, armeabi-v7a, armeabi]
Yt-dlp version: 2026.04.10.235301

URL: https://youtu.be/VQ9xn8iy0Es
WARNING: [youtube] No supported JavaScript runtime could be found. Only deno is enabled by default; to use another runtime add --js-runtimes RUNTIME[:PATH] to your command/config. YouTube extraction without a JS runtime has been deprecated, and some formats may be missing. See https://github.com/yt-dlp/yt-dlp/wiki/EJS for details on installing one
ERROR: [youtube] VQ9xn8iy0Es: This video is not available

To Reproduce

No response

Error reports

App version: 1.13.1-(F-Droid) (11312)
Device information: Android 14 (API 34)
Supported ABIs: [arm64-v8a, armeabi-v7a, armeabi]
Yt-dlp version: 2026.04.10.235301

URL: https://youtu.be/VQ9xn8iy0Es
WARNING: [youtube] No supported JavaScript runtime could be found. Only deno is enabled by default; to use another runtime add --js-runtimes RUNTIME[:PATH] to your command/config. YouTube extraction without a JS runtime has been deprecated, and some formats may be missing. See https://github.com/yt-dlp/yt-dlp/wiki/EJS for details on installing one
ERROR: [youtube] VQ9xn8iy0Es: This video is not available

Screenshots & Screen Records

Additional context

[kmcbest]

same here. I wonder if Seal is still maintained or this could be solved by yt-dlp update

[WaromiV]

same here. I wonder if Seal is still maintained or this could be solved by yt-dlp update

I think the yt-dlp js related depreciation is what broke Seal in the first place

[NEugeny74]

App version: 1.13.1 (11312)
Device information: Android 15 (API 35)
Supported ABIs: [arm64-v8a, armeabi-v7a, armeabi]
Yt-dlp version: 2026.03.17

URL: https://youtu.be/KYpS9Dc9iwo?si=HtFYWhFQO6N-6deT
WARNING: [youtube] No supported JavaScript runtime could be found. Only deno is enabled by default; to use another runtime add --js-runtimes RUNTIME[:PATH] to your command/config. YouTube extraction without a JS runtime has been deprecated, and some formats may be missing. See https://github.com/yt-dlp/yt-dlp/wiki/EJS for details on installing one
WARNING: [youtube] No title found in player responses; falling back to title from initial data. Other metadata may also be missing
ERROR: [youtube] KYpS9Dc9iwo: Sign in to confirm you’re not a bot. Use --cookies-from-browser or --cookies for the authentication. See https://github.com/yt-dlp/yt-dlp/wiki/FAQ#how-do-i-pass-cookies-to-yt-dlp for how to manually pass cookies. Also see https://github.com/yt-dlp/yt-dlp/wiki/Extractors#exporting-youtube-cookies for tips on effectively exporting YouTube cookies