fix: Move skip check before call to Youtube-DL

[zdimension]

Description

Before, the skip check was done in add_media, i.e. after the call to process_youtube. As a result, even for media for which Themerr had already downloaded a theme, Youtube-DL was still called to try and get the stream URL, which

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 #204 (0ff67b1) into nightly (dadf374) will decrease coverage by 1.93%.
The diff coverage is 44.44%.

Additional details and impacted files

@@             Coverage Diff             @@
##           nightly     #204      +/-   ##
===========================================
- Coverage    68.98%   67.06%   -1.93%     
===========================================
  Files           10       10              
  Lines          748      759      +11     
===========================================
- Hits           516      509       -7     
- Misses         232      250      +18     

Flag	Coverage Δ
Linux	67.06% <44.44%> (?)
macOS	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
Contents/Code/constants.py	86.11% <100.00%> (+0.39%)	⬆️
Contents/Code/plex_api_helper.py	47.79% <41.17%> (-4.88%)	⬇️