Add YouTube video in README

[mikhail-vl]

No description provided.

[codecov]

Codecov Report

Merging #6 (522d327) into main (43703a4) will not change coverage.
The diff coverage is n/a.

❗ Current head 522d327 differs from pull request most recent head 47db164. Consider uploading reports for the commit 47db164 to get more accurate results

@@           Coverage Diff           @@
##             main       #6   +/-   ##
=======================================
  Coverage   89.47%   89.47%           
=======================================
  Files          10       10           
  Lines         133      133           
  Branches        3        3           
=======================================
  Hits          119      119           
  Misses         13       13           
  Partials        1        1           

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[mikhail-vl]

Looks good!