Repository: yt-dlp
Issue: elpais extractor broken
Labels: site-bug,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 that yt-dlp is broken on a **supported** site
- [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 all URLs and arguments with special characters are [properly quoted or escaped](https://github.com/yt-dlp/yt-dlp/wiki/FAQ#video-url-contains-an-ampersand--and-im-getting-some-strange-output-1-2839-or-v-is-not-recognized-as-an-internal-or-external-command)
- [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 I'm willing to share it if required

### Region

United States, Colombia

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

The elpais extractor no longer finds video URLs. Site code has changed significantly since last extractor update.

### 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', 'http://elpais.com/elpais/2017/01/26/ciencia/1485456786_417876.html']
[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@2024.08.01 from yt-dlp/yt-dlp [ffd7781d6] (zip)
[debug] Python 3.11.7 (CPython x86_64 64bit) - Linux-5.15.0-117-generic-x86_64-with-glibc2.31 (OpenSSL 3.0.13 30 Jan 2024, glibc 2.31)
[debug] exe versions: ffmpeg 4.2.7, ffprobe 4.2.7, phantomjs 5, rtmpdump 2.4
[debug] Optional libraries: brotli-1.0.9, certifi-2024.02.02, requests-2.31.0, secretstorage-3.3.1, sqlite3-3.41.2, urllib3-2.0.7, websockets-12.0
[debug] Proxy map: {}
[debug] Request Handlers: urllib, websockets
[debug] Loaded 1830 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2024.08.01 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2024.08.01 from yt-dlp/yt-dlp)
[ElPais] Extracting URL: http://elpais.com/elpais/2017/01/26/ciencia/1485456786_417876.html
[ElPais] 1485456786_417876: Downloading webpage
ERROR: [ElPais] 1485456786_417876: Unable to extract URL prefix; please report this issue on  https://github.com/yt-dlp/yt-dlp/issues?q= , filling out the appropriate issue template. Confirm you are on the latest version using  yt-dlp -U
  File "/usr/local/bin/yt-dlp/yt_dlp/extractor/common.py", line 740, in extract
    ie_result = self._real_extract(url)
                ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/bin/yt-dlp/yt_dlp/extractor/elpais.py", line 57, in _real_extract
    prefix = self._html_search_regex(
             ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/bin/yt-dlp/yt_dlp/extractor/common.py", line 1369, in _html_search_regex
    res = self._search_regex(pattern, string, name, default, fatal, flags, group)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/bin/yt-dlp/yt_dlp/extractor/common.py", line 1333, in _search_regex
    raise RegexNotFoundError(f'Unable to extract {_name}')
```