More info about cctv cameras from NYP explaining the lack of info:
8 March 2016
Unsolved Claudia Lawrence investigation
“A man was filmed by a CCTV camera in Lime Court, Heworth Road, very close to Claudia’s house, on the morning after she vanished. Our review managed to unearth additional CCTV footage from that same camera shot the previous evening which appears to show the same man in the same place.
“We had this footage examined by a number of experts in the UK and abroad, but it is only as good as the camera and
it cannot be enhanced using current techniques. Despite exhaustive efforts, we have not been able to identify the man.
“The lack of extended CCTV footage from that CCTV camera on the days and weeks either side of Claudia’s disappearance, has been one of our biggest frustrations and is typical of the type of challenge that faces a cold case review team. We have reviewed material seized by the original team and, wherever possible, looked to see if additional material could be secured.
“We don’t know if that man was in the area as a matter of daily routine, or whether his appearance is of critical significance. I believe he must be local to the area, and despite extensive appeals, he hasn’t come forward. I can only speculate why he hasn’t done so, and whether someone is protecting him.”