I hadn't seen that Black Sabbath video in years. I had really forgotten how intense those guys were in their younger days. It was fun for me too.
I listen to Beth Hart quite a little and I just love her voice. I hadn't thought to compare her to Janis Joplin, but you are right on. She has that raw power that Janis brought to the table.
I still watch. It's like I can't help myself :)
I drink the Kool-Aide from the Mariners every single year.