Update video links in readme.md

[Kukicosmos]

No description provided.

[peter-jerry-ye-code-review]

From the provided git diff output for the readme.md file, here are three observations and suggestions:

1. Missing Links in Part 3 and Part 4:

   • Problem: The entries for "Part 3" and "Part 4" are missing video links.
   • Suggestion: Ensure that the video links are added to the table for completeness. This will help users access the relevant content easily.

2. Inconsistent Formatting in Part 5:

   • Problem: The entry for "Part 5" has an empty cell for the video link, which is inconsistent with the previous parts that have video links.
   • Suggestion: If there is a video associated with "Part 5", it should be linked in the table. If not, consider adding a note or placeholder to indicate why it's empty for consistency.

3. Missing Content in Part 6 and Part 7:

   • Problem: The entries for "Part 6" and "Part 7" are missing descriptions and possibly other details.
   • Suggestion: Fill in the missing details for "Part 6" and "Part 7" to provide a complete overview of the course content. This includes descriptions, video links, and any associated resources.

These suggestions aim to improve the readability and usability of the readme.md file by ensuring all parts are thoroughly described and linked to relevant resources.