[bilibili] Unable to extract information from festival-type videos

[TheMasterOfMagic]

DO NOT REMOVE OR SKIP THE ISSUE TEMPLATE

• I understand that I will be blocked if I intentionally remove or skip any mandatory* field

Checklist

• I'm reporting that yt-dlp is broken on a supported site
• I've verified that I'm running yt-dlp version 2023.06.21 (update instructions) or later (specify commit)
• I've checked that all provided URLs are playable in a browser with the same IP and same login details
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched known issues and the bugtracker for similar issues including closed ones. DO NOT post duplicates
• I've read the guidelines for opening an issue
• I've read about sharing account credentials and I'm willing to share it if required

Region

Beijing, China

Provide a description that is worded well enough to be understood

Taking the video BV17R4y1a7A2 as an example. The original URL of this video was https://www.bilibili.com/video/BV17R4y1a7A2, but it has been included by the official into the festival collection called "genshin2023". This leads to the following issues:

1. Accessing this URL in a browser will be redirected to https://www.bilibili.com/festival/genshin2023?bvid=BV17R4y1a7A2 (the new URL is still unsupported by yt-dlp because of its format).
2. The page style of this video differs from a regular video page.

After testing, it has been found that festival-type videos exhibit the same issue (several festival-type video URLs will be provided later). It is speculated that the format of certain responses for this type of video does not comply with the expectations of yt-dlp, hence causing the inability to extract information.

Example festival-type videos:

Video ID	original URL	new URL
BV17R4y1a7A2	https://www.bilibili.com/video/BV17R4y1a7A2	https://www.bilibili.com/festival/genshin2023?bvid=BV17R4y1a7A2
BV1rR4y1M713	https://www.bilibili.com/video/BV1rR4y1M713	https://www.bilibili.com/festival/genshin2022?bvid=BV1rR4y1M713
BV1tG4y1B7xU	https://www.bilibili.com/video/BV1tG4y1B7xU	https://www.bilibili.com/festival/genshin2nd?bvid=BV1tG4y1B7xU

Provide verbose output that clearly demonstrates the problem

• Run your yt-dlp command with -vU flag added (yt-dlp -vU <your command line>)
• If using API, add 'verbose': True to YoutubeDL params instead
• Copy the WHOLE output (starting with [debug] Command-line config) and insert it below

Complete Verbose Output

[debug] Command-line config: ['-vU', 'https://www.bilibili.com/video/BV17R4y1a7A2']
[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 3.11.4 (CPython x86_64 64bit) - macOS-13.3.1-x86_64-i386-64bit (OpenSSL 1.1.1u  30 May 2023)
[debug] exe versions: ffmpeg 6.0 (setts), ffprobe 6.0, rtmpdump 2.4
[debug] Optional libraries: Cryptodome-3.18.0, 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@2023.06.21, Current version: stable@2023.03.04
[debug] Downloading _update_spec from https://github.com/yt-dlp/yt-dlp/releases/latest/download/_update_spec
ERROR: You installed yt-dlp with pip or using the wheel from PyPi; Use that to update
[BiliBili] Extracting URL: https://www.bilibili.com/video/BV17R4y1a7A2
[BiliBili] 17R4y1a7A2: Downloading webpage
ERROR: [BiliBili] 17R4y1a7A2: Unable to extract play info; please report this issue on  https://github.com/yt-dlp/yt-dlp/issues?q= , filling out the appropriate issue template. Confirm you are on the latest version using  yt-dlp -U
  File "/usr/local/lib/python3.11/site-packages/yt_dlp/extractor/common.py", line 694, in extract
    ie_result = self._real_extract(url)
                ^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yt_dlp/extractor/bilibili.py", line 290, in _real_extract
    play_info = self._search_json(r'window\.__playinfo__\s*=', webpage, 'play info', video_id)['data']
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yt_dlp/extractor/common.py", line 1256, in _search_json
    json_string = self._search_regex(
                  ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.11/site-packages/yt_dlp/extractor/common.py", line 1242, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)

[TheMasterOfMagic]

Never mind. I just found out that as I was editing this issue, a new version was released and it has resolved the problem.

[TheMasterOfMagic]

Related PR: #6547