Why does my ring camera record all motion?

I bought a ring stick up camera few weeks ago as protection for my sister as she has just split up with an abusive husband. As expected, he came over this evening and kicked off. He was in front of our house for approx 15 mins, in full view of the camera. However, the ring camera has only recorded 3x 20 second clips of the incident, and most of the incident has not been picked up at all. I am very disappointed in this. Does it only record snippets of footage?? I have looked at my settings and the motion sensitivity settings is at its most sensitive so I am confused. Do I have access to all footage through "ring protect"? Please help.