Late to the party with a cautionary tale regarding dash cams and insurance.
I have been running dash cams since 2012, and 2 channel systems since 2018. Started and abandoned many regional "worst drivers of..." fb pages as the Navy threw me all across the country for the last half of my career. I've been saved by those cameras more than once, and I've had plenty of clips to share with friends and acquaintances. One thing I learned early: Everyone has an opinion, some people are just naturally contrary, and most people have no business on the road haha.
Now, the cautionary tale: In 2022 I was involved in an accident while driving my 100 mile/day, gas-sipping Honda. Two left turn lanes designed to increase volume throughput at a light. About 1/8 mile after said light, the two lanes merged into one after a sharp bend right with a serious guardrail on the right side. People unzip into these lanes, and the idea is that you zip back together on the other side of the light. I was in the outermost (right) left turn lane, and a late model Ford 150 was in the innermost (left) left turn lane. When we got the arrow we were adjacent, and since he was resting at the light ahead of me I intended to allow him to take the lead. However, he immediately starting veering into my lane (half of his truck at the apex of the turn) and I was immediately adjacent to him with a guardrail preventing me moving right. Given the distance to the rail and his slower merging into my lane (which would be ending in less than 1/8 mile), as well as me knowing that my car was FWD, I decided to gun it to get around him. My logic was that I could get around him, and if he was to continue squeezing me, a side impact on a solid rear axle was better than the front where my engine and drive were located. Unfortunately, he saw me speeding up and just sideswiped me into the guardrail.
When we stopped, I stepped out and he asked why I came into his lane. He was an older gentleman wearing an eyepatch after a recent surgery. He was upset that he was going to miss a follow-up appointment. Ironically, I was on my way to a consultation for a back procedure myself. I let him rant, and then informed him of my dash cams before calling the police. The officer showed up shortly after and I showed him the video. The rear camera clearly shows him just taking me out and me evading him. HOWEVER, I COULD have stopped before the rail, or I could have just let him hit me from the front.
In the end, the officer assigned fault to the other driver. I notified my insurance and they filed the claim against his. He had State Farm, and I (at the time) had Geico. I submitted the video evidence of him moving completely into my lane. State Farm appealed it, it went to arbitration, and I lost. The reason: I sped up. It didn't matter my reasoning, or that he was going to hit me either way short of me coming to a complete stop.
Moral of the story: Some insurance companies are bullies, and some are very, very weak. Your video is only as good as the person viewing it and what they see. In this thread alone we saw multiple interpretations of the same video, and hot takes happen without the ability to appeal. My advice is to look at it from all angles and fully consider whether or not the video hurts or helps your case before submitting it to any insurance company.