I recall having seen a cybernetic that was a video recorder. I do not recall if it was in Dark Heresy or Rogue Trader, would anyone point it out.

Do you mean the Optical Mechadendrite? (RT Core p151) Or the Memorance Implant? (RT Core p150) Cybernetic Senses? (RT Core p149) Or possibly the auspex servo-skull? (RT Core p375)

Thank you, the Memorance Implant