Repository: yt-dlp
Issue: Add site support for Extreme Music
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)
- [X] 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

Italy

### Example URLs

- Single album: https://www.extrememusic.com/albums/6778
- Playlist: https://www.extrememusic.com/playlists/8Appff68pKK820pAfAffKApApIrEYdS_AAffKAfUpUKU5KK8UUAUpKU4Kv7s74S

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

I would like to see site support for extrememusic.com added to `yt-dlp`. I have provided example URLs for both album and playlist URL types. Please let me know if I can provide any additional information!

### 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
[debug] Command-line config: ['-vU', '-P', '~/Music/New Album', '-o', '%(playlist_index)s - %(track)s.%(ext)s', 'https://www.extrememusic.com/albums/6778']
[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@2024.08.06 from yt-dlp/yt-dlp [4d9231208]
[debug] Lazy loading extractors is disabled
[debug] Python 3.12.6 (CPython arm64 64bit) - macOS-14.6.1-arm64-arm-64bit (OpenSSL 3.3.2 3 Sep 2024)
[debug] exe versions: ffmpeg 7.0.2 (fdk,setts), ffprobe 7.0.2, rtmpdump 2.4
[debug] Optional libraries: Cryptodome-3.20.0, brotli-1.1.0, certifi-2024.08.30, mutagen-1.47.0, requests-2.32.3, sqlite3-3.43.2, urllib3-2.2.3, websockets-13.0.1
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets
[debug] Loaded 1832 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2024.08.06 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2024.08.06 from yt-dlp/yt-dlp)
[generic] Extracting URL: https://www.extrememusic.com/albums/6778
[generic] 6778: Downloading webpage
WARNING: [generic] Falling back on generic information extractor
[generic] 6778: Extracting information
[debug] Looking for embeds
ERROR: Unsupported URL: https://www.extrememusic.com/albums/6778
Traceback (most recent call last):
  File "/Users/myuser/.virtualenvs/yt-dlp/lib/python3.12/site-packages/yt_dlp/YoutubeDL.py", line 1626, in wrapper
    return func(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/myuser/.virtualenvs/yt-dlp/lib/python3.12/site-packages/yt_dlp/YoutubeDL.py", line 1761, in __extract_info
    ie_result = ie.extract(url)
                ^^^^^^^^^^^^^^^
  File "/Users/myuser/.virtualenvs/yt-dlp/lib/python3.12/site-packages/yt_dlp/extractor/common.py", line 740, in extract
    ie_result = self._real_extract(url)
                ^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/myuser/.virtualenvs/yt-dlp/lib/python3.12/site-packages/yt_dlp/extractor/generic.py", line 2526, in _real_extract
    raise UnsupportedError(url)
yt_dlp.utils.UnsupportedError: Unsupported URL: https://www.extrememusic.com/albums/6778
```