chore(frontend/MkMediaVideo): loop and autoplay silent videos

[acid-chicken]

What

無音の動画っぽい場合はループして自動再生するように

Why

Resolve #3969

Additional info (optional)

Checklist

• Read the contribution guide
• Test working in a local environment
• (If needed) Add story of storybook
• (If needed) Update CHANGELOG.md
• (If possible) Add tests

[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (e0de863) 78.71% compared to head (b20c24f) 78.70%.

Files	Patch %	Lines
packages/frontend/src/scripts/media-has-audio.ts	0.00%	9 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #12392      +/-   ##
===========================================
- Coverage    78.71%   78.70%   -0.02%     
===========================================
  Files          947      948       +1     
  Lines       102411   102427      +16     
  Branches      8273     8272       -1     
===========================================
- Hits         80613    80611       -2     
- Misses       21798    21816      +18     

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[github-actions]

このPRによるapi.jsonの差分

差分はこちら

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[syuilo]

👍