The DVR116GF1 is typically an OEM model (often associated with Hikvision or similar manufacturers). Because these are white-labeled products, finding the exact file can be tricky.
Some companies host firmware updates on dedicated servers. A web search might lead you to such a site. dvr116gf1 firmware
This is the trickiest part. Because the DVR116GF1 is an OEM platform, different resellers (e.g., Amcrest, Zmodo, Night Owl, generic Chinese models) customize the firmware with their own logos and cloud services. The DVR116GF1 is typically an OEM model (often
Here's a possible outline for a paper on "dvr116gf1 firmware": different resellers (e.g.