To give anyone a quick start with the tool, I have just uploaded a short screen movie with the basic process of using PersonaTool as a YouTube viewer. That is not the main purpose of the tool, but cool nonetheless!
Please note that PersonaTool has Adobe Flash disabled, so only HTML5 videos (like on YouTube) are playing correctly.
This is the video:
It also shows that each browser you start is completely separate from each other by opening Facebook as well.