People have written a whole bunch of things that aren't true. The first thing I did was download a 45min youtube video at 720p. It took under 2 minutes and was totally free. Very simple and intuitive interface. I then chose to donate because the darned thing works so well. People say that payment is required in order to download in HD. Okay, but the amount of headaches that this add-on is saving me is so huge that I don't care. (I like to watch videos while I wash dishes, but my wifi doesn't 'reach' into my kitchen so videos stall when live streaming. And 1000 other reasons that I like to 'preload' youtube videos for offline viewing)