Band name is ILLUSION. It's an old, legendary heavy metal Polish band. This is the official video of their upcoming new album. You can easily find the lyrics (http://www.tekstowo.pl/piosenka,illusion,kto_jest_winien_.html) and google translate it to English. But you can also easily see, that one of the guitarist is one of us - Anonymous. And the "Jesteśmy wszędzie" means "we are everywhere" :) The message is clear, even without knowing Polish, only by looking on the videoclip ;)

Thx Lynds for hints, next time I will make proper description :) Luvs <3