I knew as soon as I heard the first clip below who had been a big influence on this South African band formed in 1999 under the name Saron Gas. Their first major label release was in 2002 with Disclaimer. It was apparent to me the grunge sound of nineties Seattle, specifically Alice In Chains, were a favorite of the band. Especially in that first clip, singer Shaun Morgan sounds very much like Alice vocalist Jerry Cantrell

A western motif here: