I don't think they artificially blurred the faces. I think the camera quality (or at least this video rendering) is that bad. You can see the block artifacts in just about every sharp line in the first video clips from Rite-Aid where the perps are hitting the cash registers and liquor. The clip where they break the pharmacy glass is not so "blocky" and I don't think there is artificial blurring of their faces in those frames. I suspect that footage is from a different store. Once again however, this video footage is appalling, but pretty normal for CCTV systems. A lot of systems are pretty old and to be honest the image quality has improved tremendously over the last 5 or so years. Anything before that was pretty crappy - even for professionally installed systems.