Use the command yt-dlp -x --audio-format flac [URL] if you specifically need the FLAC container for editing purposes. JDownloader2
If you still want the best possible audio from a YouTube link, Reddit's tech communities (like r/DataHoarder and r/audiophile) suggest these tools to avoid malware and get the cleanest "bit-for-bit" copy. youtube flac download reddit
The Truth About "YouTube FLAC Download Reddit" Recommendations Use the command yt-dlp -x --audio-format flac [URL]