There are at least 5 artists called Mercenary:
These are videos from concerts where Mercenary played, so they may be of other bands that played the concert as well.
Wacken Open Air 2008 Jul 31 - Aug 2, 2008 Wacken, Schleswig-Holstein, Germany Added by Kafroman
Roskilde Festival 2005 Jun 30 - Jul 3, 2005 Roskilde, Zealand, Denmark Added by Concert Archives