Any clicks on such buttons will produce popups and malware installs. There are services that provide youtube to mp3 conversion, if you put their button on your site.
CONVERTIDOR DE YOUTUBE A MP3 ON LINE ANDROID
It's a known android thing, just get a different software, like VLC.
CONVERTIDOR DE YOUTUBE A MP3 ON LINE SOFTWARE
Also note, if your software is showing same thumbnail for all mp3s,.