Repository: yt-dlp
Issue: heise.de: Unable to extract container ID
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)
- [ ] 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

Worldwide

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

Tested from Germany. The only relevant existing bug I could find is #1520 which was fixed already by  #5029, thus to my understanding no duplicate.

### 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
user@host:~$ yt-dlp -vU -x --audio-format mp3 "https://www.heise.de/blog/Die-Produktwerker-UX-Management-fuer-Product-Owner-9597750.html"
[debug] Command-line config: ['-vU', '-x', '--audio-format', 'mp3', 'https://www.heise.de/blog/Die-Produktwerker-UX-Management-fuer-Product-Owner-9597750.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@2023.12.30 from yt-dlp/yt-dlp [f10589e34] (zip)
[debug] Python 3.10.12 (CPython x86_64 64bit) - Linux-6.5.0-14-generic-x86_64-with-glibc2.35 (OpenSSL 3.0.2 15 Mar 2022, glibc 2.35)
[debug] exe versions: ffmpeg 4.4.2 (setts), ffprobe 4.4.2, phantomjs ., rtmpdump 2.4
[debug] Optional libraries: Cryptodome-3.11.0, brotli-1.0.9, certifi-2020.06.20, mutagen-1.45.1, pyxattr-0.7.2, requests-2.25.1, secretstorage-3.3.1, sqlite3-3.37.2, urllib3-1.26.5, websockets-9.1
[debug] Proxy map: {}
[debug] Request Handlers: urllib
[debug] Loaded 1798 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2023.12.30 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2023.12.30 from yt-dlp/yt-dlp)
[Heise] Extracting URL: https://www.heise.de/blog/Die-Produktwerker-UX-Management-fuer-Product-Owner-9597750.html
[Heise] 9597750: Downloading webpage
ERROR: [Heise] 9597750: Unable to extract container ID; 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 "/home/user/bin/yt-dlp/yt_dlp/extractor/common.py", line 718, in extract
    ie_result = self._real_extract(url)
  File "/home/user/bin/yt-dlp/yt_dlp/extractor/heise.py", line 170, in _real_extract
    container_id = self._search_regex(
  File "/home/user/bin/yt-dlp/yt_dlp/extractor/common.py", line 1266, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
```