Fantastic! I am able to save videos almost lightning fast, and when youtube breaks, this is fixed soon after. I love this and I hope it never goes away.
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Update: now it is a year later, and I have found a problem. Sometimes there is a long list of all of the resolutions. In the last video, I have found about 8 for each. I chose one to download it, and it said it downloaded successfully, but the file size is zero, and it will not play. I really don't want to select each one and wait for what seems like forever. It would take a long time, and I might get the same result for each, wasting time. Sometimes there is no button at all. I paid for that.