Certainly, a quick search can show you that the overwhelming majority of video views occur on a small number of platforms, and that you are an outlier. If I am someone who has a message to share, far and away the most effective place to share that as a video would be YT, hands down. And that doesn't even begin to address the fact that all of these platforms are converging on the same definitions of safe speech anyhow, so the diversity is nominal.