10 Things You Learned in Preschool That'll Help You With mp3 convert from youtube
https://blast-wiki.win/index.php?title=11_Ways_to_Completely_Sabotage_Your_online_youtube_mp3_converter
You can directly drag the files to the program or click "File" icon on the tool bar to import files. Bear in mind that as the quality of the video becomes much better, the longer the downloading time will be.