Manton hits the nail on the head:
Facebook and YouTube are conflicted about how to handle this because their model is wrong. Unlike podcasts and blogs, which can live at a custom domain and move between hosting companies, videos on Facebook and YouTube are served directly on those platforms. If the videos are blocked, especially by YouTube which controls nearly all video on the web, there’s no obvious migration path away.
The solution is clear: post to your own site, encourage other people to get their own domain name, and support smaller social networks like Micro.blog that are empowered by design to curate.