build(deps): Bump youtube-dl and add as a submodule

[ReenigneArcher]

Description

Add youtube-dl as a submodule. This "should" allow dependabot to keep it updated.

Reference: LizardByte/Themerr-plex#300

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components

Branch Updates

LizardByte requires that branches be up-to-date before merging. This means that after any PR is merged, this branch
must be updated before it can be merged. You must also
Allow edits from maintainers.

• I want maintainers to keep my branch updated

[codecov]

Codecov Report

Merging #140 (e29ef7d) into master (848f8f4) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #140   +/-   ##
=======================================
  Coverage   65.03%   65.03%           
=======================================
  Files           3        3           
  Lines         163      163           
=======================================
  Hits          106      106           
  Misses         57       57           

Flag	Coverage Δ
Linux	65.03% <ø> (?)
Windows	65.03% <ø> (ø)
macOS	65.03% <ø> (ø)

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