: Most YouTube videos stream audio in AAC or Opus formats, typically capped at 128kbps to 160kbps . Even "4K" videos do not automatically mean higher-quality audio; the platform usually maxes out at a lossy bitrate that is "good enough" for most ears but lacks the data-rich depth of a lossless file.
While you cannot technically "upscale" audio, ensure your converter doesn't introduce more compression. True converters will take the source Opus stream and containerize it into FLAC, resulting in a larger file size but no further loss. Conclusion yt flac best
If true lossless quality from YouTube is a myth, why is this search term so popular, and why should you still care? : Most YouTube videos stream audio in AAC
Excellent editing capabilities; exports true FLAC from the system audio mixer. True converters will take the source Opus stream