I've only just installed it today. I click on the icon on the url bar and the Youtube window goes black. I can still hear the music or audio. I tried to see if it reduced my bandwidth usage but I couldn't figure out definitively with the windows network monitoring tools: https://answers.microsoft.com/en-us/ie/forum/ie8-windows_other/how-can-i-monitor-download-usage-using-windows-7/6ce7c97d-d279-4130-859a-377747887684 So, I can't yet certify that it reduces bandwidth use. I choose this one of others that had more users because this one doesn't ask for permission to access data from all websites. I am afraid of apps like those - maybe they'll take my passwords. Why do they need that data if their app is only for Youtube? This one feels safer because of that.

I like it. For youtube videos with annoying facecams. Or simply bad videos with good audio. Like music videos.