Repository: yt-dlp
Issue: [tou.tv] Unable to download JSON metadata: HTTP Error 426: Upgrade Required
Labels: site-bug

### 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

Canada

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

Whenever I try to download any video from tou.tv (I have tried several), it gives me the HTTP 426 error, saying an upgrade is required.  I noticed that there were a few issues with CBC Gem and the 426 error, but I could not find any currently-open issues for tou.tv that mention the 426 error.

### Provide verbose output that clearly demonstrates the problem

- [X] Run **your** yt-dlp command with **-vU** flag added (`yt-dlp -vU <your command line>`)
- [X] 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: ['https://ici.tou.tv/vieillir-autrement/s01e01', '-o', 'D:\\Downloaded Audio-Video Tracks\\ViaYouTubeDL\\tou.tv\\Custom\\%(title)s-%(id)s.%(ext)s', '--get-url', '-vU']
[debug] Encodings: locale cp1252, fs utf-8, pref cp1252, out cp1252 (No VT), error cp1252 (No VT), screen cp1252 (No VT)
[debug] yt-dlp version stable@2024.05.27 from yt-dlp/yt-dlp [12b248ce6] (win_exe)
[debug] Python 3.8.10 (CPython AMD64 64bit) - Windows-10-10.0.22621-SP0 (OpenSSL 1.1.1k  25 Mar 2021)
[debug] exe versions: ffmpeg 6.0-essentials_build-www.gyan.dev (setts), ffprobe 6.0-essentials_build-www.gyan.dev
[debug] Optional libraries: Cryptodome-3.20.0, brotli-1.1.0, certifi-2024.02.02, curl_cffi-0.5.10, mutagen-1.47.0, requests-2.32.2, sqlite3-3.35.5, urllib3-2.2.1, websockets-12.0
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets, curl_cffi
[debug] Loaded 1820 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2024.05.27 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2024.05.27 from yt-dlp/yt-dlp)
[debug] Using fake IP 99.234.109.192 (CA) as X-Forwarded-For
[tou.tv] Extracting URL: https://ici.tou.tv/vieillir-autrement/s01e01
[tou.tv] vieillir-autrement: Downloading JSON metadata
[tou.tv] vieillir-autrement: Unable to download JSON metadata: HTTP Error 426: Upgrade Required (caused by <HTTPError 426: Upgrade Required>)
  File "yt_dlp\extractor\common.py", line 734, in extract
  File "yt_dlp\extractor\toutv.py", line 63, in _real_extract
  File "yt_dlp\extractor\common.py", line 1133, in download_content
  File "yt_dlp\extractor\common.py", line 1093, in download_handle
  File "yt_dlp\extractor\common.py", line 954, in _download_webpage_handle
  File "yt_dlp\extractor\common.py", line 903, in _request_webpage
  File "yt_dlp\extractor\common.py", line 890, in _request_webpage
  File "yt_dlp\YoutubeDL.py", line 4142, in urlopen
  File "yt_dlp\networking\common.py", line 117, in send
  File "yt_dlp\networking\_helper.py", line 208, in wrapper
  File "yt_dlp\networking\common.py", line 337, in send
  File "yt_dlp\networking\_requests.py", line 366, in _send
yt_dlp.networking.exceptions.HTTPHTTP Error 426: Upgrade Required
An error occured
```