By providing a lossless source file, you ensure that YouTube’s internal transcoders have the highest quality data to work with when creating the various lossy versions used for playback.

: Below the video title, click the three dots (...) or "More" and select "Show transcript" .

: A versatile, free-to-use desktop toolkit that handles both video and high-quality audio extraction. 2. The Open-Source Method (Best for Privacy & Control) VLC Media Player