http://www.youtube.com/watch?v=s3jXZiKYWGQ
One of biggest, if not the biggest, of polish death metal band's - they got signed under Nuclear Blast few albums ago.
and CD sounds like 1000x better than this on youtube.

and here is their cover of Black Metal by Venom
http://www.youtube.com/watch?v=gINbJt65184