A newly resurfaced video has given fans a fascinating look at a lesser-known moment in the history of 'Black Sabbath' . The legendary metal pioneers are seen performing with a different vocalist, two years before Ozzy Osbourne  made his official exit from the group. Choosing between Paranoid  and Heaven and Hell  has divided the fan base for decades. Followers of 'Black Sabbath'  often fall into two distinct camps: those who defend the classic era fronted by Ozzy , and those