Downloading copyrighted music via third-party converters generally violates YouTube's Terms of Service and may infringe on copyright laws. Consider these safer options:
Download 4K YouTube to MP3 from their official website (do not use a crack). 320 kbps mp3 youtube download
Downloading public domain recordings, royalty-free music, or using a clip for criticism/review falls under fair use. 320 kbps mp3 youtube download