[ie/youtube] Fix consent cookie

[coletdjnz]

IMPORTANT: PRs without the template will be CLOSED

Description of your pull request and other information

Fixes #7594

CONSENT cookie no longer appears to be used.

YouTube now sets the SOCS cookie based on if you accept/reject all.

This sets the bare minimum SOCS cookie with a value of "accept all". We can't use reject all by default as some things don't work such as mixes. If a user wants to reject all then they can manually pass the cookie.

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:

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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
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Copilot Summary

🤖 Generated by Copilot at e7be2f3

Summary

🍪🎵🔒

Replace consent cookie with SOCS cookie for YouTube extraction. Fix YouTube mix extraction by setting SOCS cookie to 'CAI'. Add secure flag to SOCS cookie.

SOCS cookie set
YouTube mixes now working
Winter of consent

Walkthrough

• Replace the consent cookie code with a simpler SOCS cookie code for YouTube extraction (link)