Yes you can definitely view your CCTV footage on your mobile phone at your work via internet. Sentient CCTV DVR basically is a night vision camera. You must know the IP of the camera and IP Video server. Connecting your phone to CCTV camera via the protocol you can view the CCTV footage's in your phone. Night vision cameras are used for surveillance purpose. I would prefer cctv camera with ir illuminator
for good image quality in the night time that will clear footage quality in my phone.
Recently many new applications have also being launched by security cameras with a view to solve problem you mentioned.