How long should videos be kept?

Question

CCTV

Good day!
Interested in whether there are any official standards for the retention of video recordings from surveillance cameras? In particular, we are interested in the storage time of video from cameras installed in a PCI DSS-certified data center. Unfortunately, no official data/standards/recommendations could be found. It is clear that the longer - the better, but still.

Answer 1

In fact, everything is described in PCI DSS.

3.4.5.4 Retention of Video Recordings
3.4.5.4.a CCTV images must be kept for at least 90 days and must be backed up daily. Both primary
and backup copies must exist for a minimum of 90 days
The backup recording must be stored in a separate, secure location within the facility and must
ensure segregation of duties between the users and administrators of the system. Backups
may also be stored in other facilities via techniques such as disk mirroring, provided the storage
is secure in accordance with these requirements.