The concerns in your second paragraph can be mostly mititgated using a combination of trusted timestamping, PKI, cryptographically chained logs and trusted hardware. Recordings from normal hardware will increasingly approach complete untrustworthiness as time goes on.

The concerns raised in the first paragraph however... the next few decades are going to be a wild ride. Hopefully humanity eventually reaches an AI-supported utopic state where people can wrap themselves in their own realities, without it meaningfuly affecting anyone else. Perception of reality is already highly subjective, most of the fundamental issues are due to resource scarcity/inequality. Most other issues evaporate once that's solved.