[Wuli]

if you can tell me the name of a the Firefox addon,
and give me an example (at apecific url) of a YouTube video you have tried to download, I will try it in my Firefox on my PC and let you know if I get the same error.

[ducttape45]

IF you want, I can send you an email with some snap shots of the screen. I sent an email to the creator of the plugin in question and he was as baffled as I was.

If you agree, send me your email via Freepmail and I'll forward you the information. Thanks for your help.