try these videos
https://video.search.yahoo.com/yhs/search;_ylt=AwrWneqOX1Rc2mQAoFIPxQt.;_ylu=X3oDMTByNWU4cGh1BGNvbG8DZ3ExBHBvcwMxBHZ0aWQDBHNlYwNzYw–?p=Hohner+Panther+Diatonic+Accordion&fr=yhs-domaindev-st_emea&hspart=domaindev&hsimp=yhs-st_emea