What's the best way to back-up data particularly video files on a network?

Answering to your comments,smither777:

I thought, the configuration of a local area network with a backup server which Terrabyte external drives and backup should be facilitated by Genie-Soft Backup Software ..?

Depending on the size, you probably want to make a backup to disk, then run a tape backup that data on employment. I Veritas and I have a daily backup of a range 1TB and then a tape backup is running. You can have it on your primary or secondary, you can install network cards to create a network of private relief.