My brother plays guitar in a deathcore band.

The band's name is Depths Of Hatred.

Listen to their first single, Vile Consumption:

DEPTHS OF HATRED - Vile Consumption (live video)

Here is their debut video, which features a track from their debut album, AVERSIONIST:

Depths Of Hatred - "Revocation" (Feat. Elliot Desgagnes of Beneath The Massacre)

In 2013, they released a single call Secluded Redemption:

DEPTHS OF HATRED - Secluded Redemption (Guitar Playthrough)

Now Son Of Perdition from their second album, Hellborn:

DEPTHS OF HATRED - Son Of Perdition

And Misery Enslaved from the same 2014 album:

Depths Of Hatred - "Misery Enslaved"

Another playthrough, this time all instruments playing Human Decay, another Hellborn track:

DEPTHS OF HATRED - Human Decay (Instrument Playthrough)

Finally, their new single, Accursed Demise:

Depths Of Hatred - Accursed Demise (Official Music Video)

My bro also produces videos at Darkest Media , check it out.