MP3 Converter for Youtube can be handy in converting your favourite MP3 Videos but you should be careful in making slection for free tool as they have add ons and it gets installed along with freeware and might work as malware. So you need to read the agreement before running the installers. Unfortunately, if you have already installed one on your System , then kindly check this out: https://www.removemalwarevirus.com/simple-steps-to-uninstall-ytmp3-cc-from-safari
Recommend you guys one convenient site: https://youtubetomp3music.com/
You can use it to download MP3/MP4 from most sites, it is fast, free and no registration required.