Modulo the video, I did exactly this when I ran a team, only for what I thought were "important" or "gnarly" PRs. It works. I rarely had to spend more than an hour on a PR, because small, atomic PRs were all but mandatory on my team, with "atomic" taking precedence over "small". I would also review some of the PRs post-facto, after they are committed, as I was almost never a "formal"/blocking reviewer on them.

Recording a video seems excessive to me. No one has the time or desire to watch me bloviate about something that I could say in a few PR comments that can be quickly skimmed.