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

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