Download Forensic Data of IP's that connected

Hi All, I'm curious if anyone knows how to get a data log that would list every IP address that might have access to the App or somehow interfered with the video files. I have this very strange thing happen where there were 17 recordings over several hours while I was not at home and things were stolen but all the video files somehow were deleted or not fully recorded. It's incredibly suspect and I'm curious if anyone has any magic bullets for me. Regards,