I have installed Download helper ext from your add on, so I can download video and songs from Youtube to my Mac. Just last night, i would just click on the three color balls and it would download mp4 to my computer. However now when I click on the colored balls, it shows flv format. Further I am not able to convert to Mp3. The arrow and drop down menu are still there but no conversion occurs. Please help me. I want to be able to down load video and audio from you tube to my Mac so I can play them on my itune. Thanks.