Repository: yt-dlp
Issue: Support for Livestream website Parti
Labels: site-request,triage

### DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

- [X] I understand that I will be **blocked** if I *intentionally* remove or skip any mandatory\* field

### Checklist

- [X] I'm reporting a new site support request
- [X] I've verified that I have **updated yt-dlp to nightly or master** ([update instructions](https://github.com/yt-dlp/yt-dlp#update-channels))
- [X] I've checked that all provided URLs are playable in a browser with the same IP and same login details
- [X] I've checked that none of provided URLs [violate any copyrights](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#is-the-website-primarily-used-for-piracy) or contain any [DRM](https://en.wikipedia.org/wiki/Digital_rights_management) to the best of my knowledge
- [X] I've searched [known issues](https://github.com/yt-dlp/yt-dlp/issues/3766) and the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar issues **including closed ones**. DO NOT post duplicates
- [X] I've read the [guidelines for opening an issue](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#opening-an-issue)
- [ ] I've read about [sharing account credentials](https://github.com/yt-dlp/yt-dlp/blob/master/CONTRIBUTING.md#are-you-willing-to-share-account-details-if-needed) and am willing to share it if required

### Region

_No response_

### Example URLs

Single video: https://parti.com/video/3121
Single video: https://parti.com/video/3160

### Provide a description that is worded well enough to be understood

This is a newer livestream platform for content creators. You can watch past broadcasts as listed above without signing in. When I put the link in yt-dlp, it defaults to the generic extractor which fails.

### Provide verbose output that clearly demonstrates the problem

- [X] Run **your** yt-dlp command with **-vU** flag added (`yt-dlp -vU <your command line>`)
- [ ] If using API, add `'verbose': True` to `YoutubeDL` params instead
- [X] Copy the WHOLE output (starting with `[debug] Command-line config`) and insert it below

### Complete Verbose Output

```shell
[gtaxl@jetstream:youtube]./yt-dlp -F -vU https://parti.com/video/3121
[debug] Command-line config: ['-F', '-vU', 'https://parti.com/video/3121']
[debug] Encodings: locale UTF-8, fs utf-8, pref UTF-8, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2024.10.22 from yt-dlp/yt-dlp [67adeb7ba] (zip)
[debug] Python 3.9.2 (CPython x86_64 64bit) - Linux-5.10.0-32-amd64-x86_64-with-glibc2.31 (OpenSSL 1.1.1w  11 Sep 2023, glibc 2.31)
[debug] exe versions: ffmpeg 4.3.7-0, ffprobe 4.3.7-0
[debug] Optional libraries: certifi-2020.06.20, requests-2.25.1, sqlite3-3.34.1, urllib3-1.26.5
[debug] Proxy map: {}
[debug] Request Handlers: urllib
[debug] Loaded 1839 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2024.10.22 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2024.10.22 from yt-dlp/yt-dlp)
[generic] Extracting URL: https://parti.com/video/3121
[generic] 3121: Downloading webpage
WARNING: [generic] Falling back on generic information extractor
[generic] 3121: Extracting information
[debug] Looking for embeds
ERROR: Unsupported URL: https://parti.com/video/3121
Traceback (most recent call last):
  File "/home/gtaxl/youtube/./yt-dlp/yt_dlp/YoutubeDL.py", line 1625, in wrapper
    return func(self, *args, **kwargs)
  File "/home/gtaxl/youtube/./yt-dlp/yt_dlp/YoutubeDL.py", line 1760, in __extract_info
    ie_result = ie.extract(url)
  File "/home/gtaxl/youtube/./yt-dlp/yt_dlp/extractor/common.py", line 741, in extract
    ie_result = self._real_extract(url)
  File "/home/gtaxl/youtube/./yt-dlp/yt_dlp/extractor/generic.py", line 2533, in _real_extract
    raise UnsupportedError(url)
yt_dlp.utils.UnsupportedError: Unsupported URL: https://parti.com/video/3121

[gtaxl@jetstream:youtube]
```