Rated 3 out of 5 stars

It seems that all the major YouTube download extensions are suddenly having problems, and this one is no exception. I try to download it and it downloads 0 bytes. I'm not the only one having this problem, similar complaints have been cropping up over the past few days on other YouTube download extensions.
The only downloading extension I've tried that has downloaded anything at all was NetVideoHunter, and even that only downloads 307 kb.Someone reviewing 1-Click YouTube Download said that YouTube has recently implemented new code. So these extensions apparently all need to be updated. ><
Someone else suggested that it was a problem with Firefox 3.6.13, but I tried downgrading to 3.6.12 (where I've never had this problem before) and the problem persisted.