Component of the DNA-directed RNA polymerase (RNAP) that catalyzes the transcription in the cytoplasm of viral DNA into RNA using the four ribonucleoside triphosphates as substrates. Part of the viral DNA-directed RNA polymerase that consists of 8 polII-like subunits (RPB1, RPB2, RPB3, RPB5, RPB6, RPB7, RPB9, RPB10), a capping enzyme and a termination factor. Found in association with viral nucleoid. Belongs to the archaeal RpoH/eukaryotic RPB5 RNA polymerase subunit family.