There is more than one artist with this name:
These are videos from concerts where petra played, so they may be of other bands that played the concert as well.
Degarmo & Key / PETRA / Whitecross / X-Sinner / Barrencross / Holy Soldier Jun 28 - Jul 1, 1990 Grayslake, Illinois, United States Added by Timothy Allen Monroe
petra Apr 3, 1985 San Diego, California, United States Added by The Stealth Gamer