added comment for dealing with error messages about ffmpeg
added comment for dealing with error messages about ffmpeg

CuriousLearner/kivy,aron-bordin/kivy,jkankiewicz/kivy,jegger/kivy,bionoid/kivy,KeyWeeUsr/kivy,autosportlabs/kivy,KeyWeeUsr/kivy,manthansharma/kivy,manthansharma/kivy,janssen/kivy,janssen/kivy,arlowhite/kivy,aron-bordin/kivy,akshayaurora/kivy,KeyWeeUsr/kivy,rafalo1333/kivy,jegger/kivy,Cheaterman/kivy,bionoid/kivy,matham/kivy,matham/kivy,tony/kivy,el-ethan/kivy,vitorio/kivy,bionoid/kivy,rnixx/kivy,arlowhite/kivy,cbenhagen/kivy,autosportlabs/kivy,CuriousLearner/kivy,Cheaterman/kivy,jegger/kivy,matham/kivy,el-ethan/kivy,cbenhagen/kivy,kivy/kivy,kivy/kivy,jegger/kivy,rafalo1333/kivy,inclement/kivy,vitorio/kivy,Cheaterman/kivy,vitorio/kivy,janssen/kivy,andnovar/kivy,arlowhite/kivy,LogicalDash/kivy,kivy/kivy,kived/kivy,rnixx/kivy,LogicalDash/kivy,tony/kivy,darkopevec/kivy,tony/kivy,manthansharma/kivy,darkopevec/kivy,jkankiewicz/kivy,bionoid/kivy,LogicalDash/kivy,janssen/kivy,el-ethan/kivy,KeyWeeUsr/kivy,rafalo1333/kivy,akshayaurora/kivy,akshayaurora/kivy,manthansharma/kivy,aron-bordin/kivy,inclement/kivy,jkankiewicz/kivy,autosportlabs/kivy,Cheaterman/kivy,matham/kivy,LogicalDash/kivy,cbenhagen/kivy,rnixx/kivy,jkankiewicz/kivy,kived/kivy,darkopevec/kivy,andnovar/kivy,CuriousLearner/kivy,andnovar/kivy,aron-bordin/kivy,inclement/kivy,darkopevec/kivy,kived/kivy