Improved docstrings

[MarcSkovMadsen]

I went through the example docstrings to make them even more useful by

• Aligning their language
• Adding useful links to technologies some users might not be familiar with
• Changing ChatInterface to ChatInterface.
• Deleting the copy of the videos that had been committed by mistake
• Renaming one of the basic examples for consistency
• etc.

[codecov-commenter]

Codecov Report

All modified lines are covered by tests :white_check_mark:

Comparison is base (46090f9) 98.41% compared to head (9a8e39f) 98.41%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #59 +/- ## ======================================= Coverage 98.41% 98.41% ======================================= Files 2 2 Lines 63 63 ======================================= Hits 62 62 Misses 1 1 ```

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[ahuang11]

I think we could further expand on the docstrings using ChatGPT to get the desired language, but doesn't have to be this PR.