Flash on YouTube... Rated 5 out of 5 stars

I am a limited user on Windows XP. I have FF3.0.1.
Adminiatrator doesn't have Firefox.
Flash PlugIn can be installed only by administrator.
So, until administrator wishes to install Firefox, I cannot have Flash PlugIn installed.
Your UnPlug says Flash isn't necessary for YouTube?
But YouTube will not even try to show video without this plugin and your UnPlug will have nothing to catch.
Could you help me to download a video from YouTube with your Add-on?
Best Regards.

This review is for a previous version of the add-on (1.6.06).