Repository: yt-dlp
Issue: [BBC iPlayer] When trying to download the audio described version of the programme, the standard audio downloads
Labels: geo-blocked,site-bug

### DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

- [X] I understand that I will be **blocked** if I remove or skip any mandatory\* field

### Checklist

- [X] I'm reporting a broken site
- [X] I've verified that I'm running yt-dlp version **2022.11.11** ([update instructions](https://github.com/yt-dlp/yt-dlp#update)) or later (specify commit)
- [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 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 Kingdom

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

I've tried to download the Audio Describer version of the programme (particularly, [this one](https://www.bbc.co.uk/iplayer/episode/m0016f03/ad/gazza-series-1-episode-1)), however, what I've got is the main audio without audio description.

### 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] Copy the WHOLE output (starting with `[debug] Command-line config`) and insert it below

### Complete Verbose Output

```shell
[debug] Command-line config: ['https://www.bbc.co.uk/iplayer/episode/m0016f03/ad/gazza-series-1-episode-1', '-vU', '-o', 'Gazza_Ep1.ts']
[debug] Encodings: locale UTF-8, fs utf-8, pref UTF-8, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version 2022.11.11 [8b64402] (pip)
[debug] Python 3.10.8 (CPython x86_64 64bit) - macOS-12.5.1-x86_64-i386-64bit (OpenSSL 1.1.1s  1 Nov 2022)
[debug] exe versions: ffmpeg 4.4.3 (setts), ffprobe 4.4.3, rtmpdump 2.4
[debug] Optional libraries: Cryptodome-3.16.0, brotli-1.0.9, certifi-2022.09.24, mutagen-1.46.0, sqlite3-2.6.0, websockets-10.4
[debug] Proxy map: {}
[debug] Loaded 1723 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: 2022.11.11, Current version: 2022.11.11
yt-dlp is up to date (2022.11.11)
[debug] [bbc.co.uk] Extracting URL: https://www.bbc.co.uk/iplayer/episode/m0016f03/ad/gazza-series-1-episode-1
[bbc.co.uk] m0016f03: Downloading video page
[bbc.co.uk] m0016f03: Downloading playlist JSON
[bbc.co.uk] m0016f02: Downloading media selection JSON
[bbc.co.uk] m0016f02: Downloading m3u8 information
[bbc.co.uk] m0016f02: Downloading m3u8 information
[bbc.co.uk] m0016f02: Downloading m3u8 information
[bbc.co.uk] m0016f02: Downloading m3u8 information
[bbc.co.uk] m0016f02: Downloading m3u8 information
[bbc.co.uk] m0016f02: Downloading m3u8 information
[bbc.co.uk] m0016f02: Downloading MPD manifest
[bbc.co.uk] m0016f02: Downloading MPD manifest
[bbc.co.uk] m0016f02: Downloading MPD manifest
[bbc.co.uk] m0016f02: Downloading MPD manifest
[bbc.co.uk] m0016f02: Downloading MPD manifest
[bbc.co.uk] m0016f02: Downloading MPD manifest
[debug] Formats sorted by: hasvid, ie_pref, lang, quality, res, fps, hdr:12(7), vcodec:vp9.2(10), channels, acodec, filesize, fs_approx, tbr, vbr, abr, asr, proto, vext, aext, hasaud, source, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] m0016f02: Downloading 1 format(s): mf_cloudfront-5510-1
[debug] Invoking hlsnative downloader on "https://vod-hls-uk.live.cf.md.bbci.co.uk/usp/auth/vod/piff_abr_full_hd/eb612e-m0016f02/vf_m0016f02_6d3c1c5a-bf01-4c3e-8ecf-34e9c4bd1f9e.ism.hlsv2.ism/vf_m0016f02_6d3c1c5a-bf01-4c3e-8ecf-34e9c4bd1f9e.ism.hlsv2-audio_eng_1=128000-video=5070000.m3u8"
[hlsnative] Downloading m3u8 manifest
[hlsnative] Total fragments: 467
[download] Destination: Gazza_Ep1.ts
[download] 100% of    2.23GiB in 00:10:37 at 3.59MiB/s
[debug] ffprobe command line: ffprobe -hide_banner -show_format -show_streams -print_format json file:Gazza_Ep1.ts
[FixupM3u8] Fixing MPEG-TS in MP4 container of "Gazza_Ep1.ts"
[debug] ffmpeg command line: ffmpeg -y -loglevel repeat+info -i file:Gazza_Ep1.ts -map 0 -dn -ignore_unknown -c copy -f mp4 -bsf:a aac_adtstoasc -movflags +faststart file:Gazza_Ep1.temp.ts
```