Repository: yt-dlp
Issue: [NZOnScreen] Only able to download the first of multiple parts
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 a **supported** site is broken
- [X] I've verified that I'm running yt-dlp version **2023.03.04** ([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 [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

New Zealand (However I believe it is accessable worldwide)

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

When trying to download an episode from NZ On Screen, yt-dlp only appears to be able to download the first of (in this example) 4 parts. If you head to the link which I am downloading from, you will see under the player it has separate tabs for the 4 parts of the show, yt-dlp may only be able to do the first one as that is the one that comes up by default when the link is opened. Ideally I should be able to grab the entire thing and not just the first 1/4 of the show.

### 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: ['-vU', 'https://www.nzonscreen.com/title/flatmates-episode-one-1997']
[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@2023.03.04 [392389b7d] (pip)
[debug] Python 3.11.3 (CPython arm64 64bit) - macOS-13.3-arm64-arm-64bit (OpenSSL 1.1.1t  7 Feb 2023)
[debug] exe versions: ffmpeg 5.1.2 (setts), ffprobe 5.1.2
[debug] Optional libraries: Cryptodome-3.17, brotli-1.0.9, certifi-2022.12.07, mutagen-1.46.0, sqlite3-2.6.0, websockets-10.4
[debug] Proxy map: {}
[debug] Loaded 1786 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Available version: stable@2023.03.04, Current version: stable@2023.03.04
yt-dlp is up to date (stable@2023.03.04)
[NZOnScreen] Extracting URL: https://www.nzonscreen.com/title/flatmates-episode-one-1997
[NZOnScreen] flatmates-episode-one-1997: Downloading webpage
[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] 9216a6443cffb99c: Downloading 1 format(s): hi
[debug] Invoking hlsnative downloader on "https://media-src.nzonscreen.com/media/D-5kHh_C8CciFwsNHqEHVt5od5wANumoCVRAaHOLNMhQ-vEnNEGPrcIrrlQ5ol3B/index.m3u8?md5=UJsE20r_GGKkYT9a85thXg&expires=1682071284"
[hlsnative] Downloading m3u8 manifest
[hlsnative] Total fragments: 45
[download] Destination: Flatmates - Episode One (clip 1) [9216a6443cffb99c].mp4
[download] 100% of   89.78MiB in 00:02:01 at 758.64KiB/s
[debug] ffprobe command line: ffprobe -hide_banner -show_format -show_streams -print_format json 'file:Flatmates - Episode One (clip 1) [9216a6443cffb99c].mp4'
[FixupM3u8] Fixing MPEG-TS in MP4 container of "Flatmates - Episode One (clip 1) [9216a6443cffb99c].mp4"
[debug] ffmpeg command line: ffmpeg -y -loglevel repeat+info -i 'file:Flatmates - Episode One (clip 1) [9216a6443cffb99c].mp4' -map 0 -dn -ignore_unknown -c copy -f mp4 -bsf:a aac_adtstoasc -movflags +faststart 'file:Flatmates - Episode One (clip 1) [9216a6443cffb99c].temp.mp4'
```