You can get it working by doing this if you have enough CPU or you lower the quality settings enough.
Recommend you look at Amcrest, Dahua , Foscam (no smart alarms like the other three), or Hikvision and any NVR that supports BNC will probably cost more than a packaged deal that is IP/POE based only. You can use your BNC cables to pull though cat5/6 which makes it very easy to upgrade.