What Will mp3 converter Be Like in 100 Years?
https://alpha-wiki.win/index.php?title=The_Biggest_Problem_With_best_youtube_to_mp3_converter,_And_How_You_Can_Fix_It
Have you ever found something on YouTube that you simply can't find anywhere else? It will get stuck or hang after passing 3 or 4 numbers. It can satisfy all your requirement for the format requirement.