fixed video in docs homepage

[lucaferranti]

PR description

fixed video in docs

Before

After

Related issues

• fixes video not correctly embedded in documentation #92

Checklist

• Updated/added tests
• Updated/added docstring (needed only for exported functions)
• Updated Project.toml

Other

[codecov-commenter]

Codecov Report

Merging #95 (d9446bf) into main (4592f03) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #95   +/-   ##
=======================================
  Coverage   90.96%   90.96%           
=======================================
  Files          14       14           
  Lines         487      487           
=======================================
  Hits          443      443           
  Misses         44       44           

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[lucaferranti]

refactor matrix.jl file