[DigitalConcertHall] Support for Films

[ItzMaxTV]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

The PR adds support for films to an existing extractor that previously only supported concerts.

Fixes #7184

Template

Before submitting a pull request make sure you have:

• At least skimmed through contributing guidelines including yt-dlp coding conventions
• Searched the bugtracker for similar pull requests
• Checked the code with flake8 and ran relevant tests

In order to be accepted and merged into yt-dlp each piece of code must be in public domain or released under Unlicense. Check all of the following options that apply:

• I am the original author of this code and I am willing to release it under Unlicense
• I am not the original author of this code but it is in public domain or released under Unlicense (provide reliable evidence)

What is the purpose of your pull request?

• Fix or improvement to an extractor (Make sure to add/update tests)
• New extractor (Piracy websites will not be accepted)
• Core bug fix/improvement
• New feature (It is strongly recommended to open an issue first)

Copilot Summary

🤖 Generated by Copilot at 33df3da

Summary

🎥🎼🛠️

Improve the Digital Concert Hall extractor by adding support for different video types and more metadata. Update tests accordingly.

film or concert, we don't care, we just want to rock
We scrape the hall for every bit of metadata we can unlock
We split the concert into chapters, we don't miss a note
We test our code with film videos, we make the extractor float

Walkthrough

• Update _VALID_URL regex to support film and concert types of videos (link)
• Add a new test case for a film type video with expected metadata (link)
  • Extract type_ group from URL and use it to request appropriate JSON data from API (link)
  • Handle different structures of videos list for film and concert videos (link)
  • Pass type_ parameter to _entries method (link)
  • Accept type_ parameter and use it to conditionally extract chapters field from cuepoints key of each video item (link, link)
  • Return a list of entries with video metadata and formats (link)