Repository: yt-dlp
Issue: For the Bilibili website, yt-dlp is unable to obtain the uploader and upload date for videos that contain multiple parts (P).
Labels: site-enhancement,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 requesting a site-specific feature
- [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 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

China

### Example URLs

https://www.bilibili.com/video/BV1GJ41117iw


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

When downloading a video list, for the P0 JSON file, the fields `%(uploader)s` and `%(upload_date>%Y-%m-%d)s` cannot be correctly obtained and are displayed as NA. For P1, P2, etc., the `%(uploader)s` and `%(upload_date>%Y-%m-%d)s` fields are correctly obtained. 

> Note, This Bilibili video looks like a playlist, but it is actually a single video containing multiple parts (P), and all parts share the same `BVID` number. Bilibili also has another type of video collection, which is the one that contains multiple independent videos, where each individual video has a different `BVID`. For this type of video collection, yt-dlp is able to correctly obtain the `%(uploader)s` and `%(upload_date>%Y-%m-%d)s` fields for the P0 JSON file.

How can I correctly get the `%(uploader)s` and `%(upload_date>%Y-%m-%d)s` fields for P0? 

Here is a list of output filenames:

```
[NA]-[《狄仁杰断案传奇》86版（高清）]-P[000]-[NA]-[《狄仁杰断案传奇》86版（高清）].info.json
[一品豆腐坊少掌柜弟]-[《狄仁杰断案传奇》86版（高清）]-P[001]-[2019-12-12]-[《狄仁杰断案传奇》86版（高清） p01 第1集].info.json
[一品豆腐坊少掌柜弟]-[《狄仁杰断案传奇》86版（高清）]-P[002]-[2019-12-12]-[《狄仁杰断案传奇》86版（高清） p02 第2集].info.json
[一品豆腐坊少掌柜弟]-[《狄仁杰断案传奇》86版（高清）]-P[003]-[2019-12-12]-[《狄仁杰断案传奇》86版（高清） p03 第3集].info.json
[一品豆腐坊少掌柜弟]-[《狄仁杰断案传奇》86版（高清）]-P[004]-[2019-12-12]-[《狄仁杰断案传奇》86版（高清） p04 第4集].info.json
```

### 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', '--output', '[%(uploader)s]-[%(playlist)s]-P[%(playlist_index)03d]-[%(upload_date>%Y-%m-%d)s]-[%(title)s].%(ext)s', '--cookies', 'C:\\Users\\username\\Downloads\\cookies.txt', '--write-info-json', '--skip-download', '--paths', 'G:\\test', 'https://www.bilibili.com/video/BV1GJ41117iw']
[debug] Encodings: locale cp936, fs utf-8, pref cp936, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2024.11.18 from yt-dlp/yt-dlp [7ea278792] (win_exe)
[debug] Python 3.10.11 (CPython AMD64 64bit) - Windows-10-10.0.19041-SP0 (OpenSSL 1.1.1t  7 Feb 2023)
[debug] exe versions: ffmpeg 7.1-full_build-www.gyan.dev (setts), ffprobe 7.1-full_build-www.gyan.dev
[debug] Optional libraries: Cryptodome-3.21.0, brotli-1.1.0, certifi-2024.08.30, curl_cffi-0.5.10, mutagen-1.47.0, requests-2.32.3, sqlite3-3.40.1, urllib3-2.2.3, websockets-13.1
[debug] Proxy map: {}
[debug] Request Handlers: urllib, requests, websockets, curl_cffi
[debug] Loaded 1837 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Latest version: stable@2024.11.18 from yt-dlp/yt-dlp
yt-dlp is up to date (stable@2024.11.18 from yt-dlp/yt-dlp)
[BiliBili] Extracting URL: https://www.bilibili.com/video/BV1GJ41117iw
[BiliBili] 1GJ41117iw: Downloading webpage
[BiliBili] BV1GJ41117iw: Extracting videos in anthology
[BiliBili] Downloading playlist BV1GJ41117iw - add --no-playlist to download just the video BV1GJ41117iw
[download] Downloading playlist: 《狄仁杰断案传奇》86版（高清）
[info] Writing playlist metadata as JSON to: G:\test\[NA]-[《狄仁杰断案传奇》86版（高清）]-P[000]-[NA]-[《狄仁杰断案传奇》86版（高清）].info.json
[BiliBili] Playlist 《狄仁杰断案传奇》86版（高清）: Downloading 14 items of 14
[download] Downloading item 1 of 14
[BiliBili] Extracting URL: https://www.bilibili.com/video/BV1GJ41117iw?p=1
[BiliBili] 1GJ41117iw: Downloading webpage
[BiliBili] BV1GJ41117iw: Extracting videos in anthology
[BiliBili] 78895467: Extracting chapters
[debug] Formats sorted by: hasvid, ie_pref, lang, quality, res, fps, hdr:12(7), vcodec, channels, acodec, size, br, asr, proto, vext, aext, hasaud, source, id
[debug] Default format spec: bestvideo*+bestaudio/best
[info] BV1GJ41117iw_p1: Downloading 1 format(s): 100024+30280
[info] Writing video metadata as JSON to: G:\test\[一品豆腐坊少掌柜弟]-[《狄仁杰断案传奇》86版（高清）]-P[001]-[2019-12-12]-[《狄仁杰断案传奇》86版（高清） p01 第1集].info.json
```