Convert Youtube to mp4 in 1080p, 2k, 4k, 8k online - YT5s
5 Easy Ways to Convert YouTube to Mp3 for FREE
GitHub - AddonDeveloper/youtube-to-mp3-userscript: The 320 kbps YouTube mp3 userscript generates a 320 kbps - MP3 DOWNLOAD button on YouTube.com. Convert YouTube to mp3 and download the file to your device.