yt-dlp: No supported JavaScript runtime could be found

[besendorf]

When downloading a song from youtube I see this error:

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
[youtube] oipgKvCPMQw: Downloading android vr player API JSON

Should a Javascript runtime be installed when using this? Maybe this can be added to the install isntructions or the install script.
This issue has been mentioned in #79 already but was closed

[t-beaver]

The issue/error comes not from UltraSinger, but from yt-dpl.

I've fixed it by:

1. install deno (brew install deno)

If that still doesn't work try this:

echo '--extractor-args "youtube:player_js_variant=tv' >> ~/yt-dlp.conf
```

[magicus]

Do yt-dlp actually require deno, without depending on it? 🤔

[besendorf]

Do yt-dlp actually require deno, without depending on it? 🤔

you're right. It's a bit odd that they show the error without depending on it. Maybe it's because they want the user to be able to choose a runtime? Also I think it's only required when youtube shows you a "not a robot" challenge. Maybe Ultrasinger should add it to it's dependencies to catch the challenge cases and get rid of the error message

[t-beaver]

BTW: The "not a robot" challange is coming not for all videos.

Before I was installing deno, it worked for some videos without, other videos didn't work.