Repository: yt-dlp
Issue: Video download from arte.tv results in tiny text file
Labels: site-bug

### Checklist

- [X] I'm reporting a broken site
- [X] I've verified that I'm running yt-dlp version **2021.11.10.1**. ([update instructions](https://github.com/yt-dlp/yt-dlp#update))
- [X] I've checked that all provided URLs are alive and playable in a browser
- [X] I've checked that all URLs and arguments with special characters are [properly quoted or escaped](https://github.com/ytdl-org/youtube-dl#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 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

France

### Description

Trying to download a video from arte.tv just downloads a tiny text file. This used to work a couple weeks ago at most, so something probably changed very recently on arte.tv.
```bash
$ yt-dlp  "https://www.arte.tv/fr/videos/104352-000-A/le-temps-retrouve/"
[ArteTV] 104352-000-A: Downloading JSON metadata
[ArteTV] 104352-000-A: Downloading m3u8 information
WARNING: [ArteTV] Failed to download m3u8 information: HTTP Error 404: Not Found
[ArteTV] 104352-000-A: Downloading m3u8 information
[info] 104352-000-A: Downloading 1 format(s): HTTPS_SQ_1
[download] Destination: Le Temps retrouvé [104352-000-A].mp4
[download] 100% of 24.00B in 00:00

$ cat "Le Temps retrouvé [104352-000-A].mp4" 
ftypmp42isommp42
```


### Verbose log

```shell
[debug] Command-line config: ['-Uv', 'https://www.arte.tv/fr/videos/104352-000-A/le-temps-retrouve/']
[debug] User config file: /home/antoine/.config/yt-dlp/config
[debug] User config: ['--no-playlist', '-S', '1200']
[debug] Encodings: locale UTF-8, fs utf-8, out utf-8, err utf-8, pref UTF-8
[debug] yt-dlp version 2021.11.10.1
[debug] Python version 3.8.12 (CPython 64bit) - Linux-5.4.0-90-generic-x86_64-with-glibc2.17
[debug] exe versions: avconv 4.2.4, avprobe 4.2.4, ffmpeg 4.2.4, ffprobe 4.2.4, rtmpdump 2.4
[debug] Optional libraries: Cryptodome, mutagen, sqlite, websockets
[debug] Proxy map: {}
yt-dlp is up to date (2021.11.10.1)
[debug] [ArteTV] Extracting URL: https://www.arte.tv/fr/videos/104352-000-A/le-temps-retrouve/
[ArteTV] 104352-000-A: Downloading JSON metadata
[ArteTV] 104352-000-A: Downloading m3u8 information
WARNING: [ArteTV] Failed to download m3u8 information: HTTP Error 404: Not Found
[ArteTV] 104352-000-A: Downloading m3u8 information
[debug] Sort order given by user: 1200
[debug] Sort order given by extractor: res, quality
[debug] Formats sorted by: hasvid, ie_pref, 1200, res, quality, lang, fps, hdr:12(7), vcodec:vp9.2(10), acodec, filesize, fs_approx, tbr, vbr, abr, asr, proto, vext, aext, hasaud, source, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] 104352-000-A: Downloading 1 format(s): HTTPS_SQ_1
[debug] Invoking downloader on "https://arteptweb-a.akamaihd.net/am/ptweb/104000/104300/104352-000-A_SQ_0_VOF_06228291_MP4-2200_AMM-PTWEB_1eb6F17hnQs.mp4"
[download] Destination: Le Temps retrouvé [104352-000-A].mp4
[download] 100% of 24.00B in 00:00
```