Update YouTube Media Links and Add Latest News Articles

[lodl]

Description:
This pull request will:

1. Update nocookie YouTube Media Links:

   • 2024-12-04-media-cardano-constitutional-convention-delegate-discussions
   • 2024-12-05-media-cardano-constitutional-convention-delegate-voting
   • 2024-12-06-media-cardano-constitutional-convention-signing-ceremony

2. Add Latest News Articles:

   • Introduce two new articles to the news section:
     • "Serial Monopoly on Blockchain with Quasi-Patient Users" - February 11, 2025
       • Directory: blog/2025-02-11-serial-monopoly-blockchain/
       • Files to Add:
         • index.md: Contains the article content.
         • banner.webp: Associated banner image.
     • Weekly Development Report - February 21, 2025
       • Directory: blog/2025-02-21-weekly-development-report/
       • Files to Add:
         • index.md: Contains the report content.
         • banner.webp: Associated banner image.

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Testing:

• Local Build Verification: Build the site locally to confirm that the new articles render correctly in the news section.
• Content Review: Verified that each index.md file displays properly with accurate formatting and that all images (banner.webp) load as intended.
• Link Validation: Checked all internal and external links within the new articles to confirm they direct to the correct destinations.

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Additional Notes:
Please review the updated media links and added content for accuracy and completeness before merging.

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