fix(youtube): add PlayerLegacyDesktopYpcOffer node

[LuanRT]

Description

Adds the PlayerLegacyDesktopYpcOffer error screen node, which appears when trying to retrieve members-only content. This also fixes a couple of warnings regarding the VideoPrimaryInfo node that only appear when viewing such content as well.

Type of change

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings