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Some mp4 files don't play on Fedora Linux

Steps to reproduce:

  1. Open Firefox and go to https://samplelib.com/sample-mp4.html. Verify that all videos are being played without any issues.
  2. Open tor browser launcher and go https://samplelib.com/sample-mp4.html. Observe an error: "Video can't be played because the file is corrupt". Open console and observe details: "Media resource https://samplelib.com/lib/preview/mp4/sample-5s.mp4 could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005) Details: Error no decoder found for audio/mp4a-latm"
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