test: add MP4 playback tests

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 54.75%. Comparing base (099a6e8) to head (5156b6e).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3245 +/- ## ========================================== - Coverage 55.83% 54.75% -1.08% ========================================== Files 150 153 +3 Lines 17105 18282 +1177 ========================================== + Hits 9551 10011 +460 - Misses 6804 7455 +651 - Partials 750 816 +66 ```

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[github-actions[bot]]

This issue is mentioned in release v1.8.0 🚀 Check out the entire changelog by clicking here