IPFS.io can host files of any size if you set up your own node. As your video attracts more viewers, more nodes will host it.

The weakness of IPFS right now is that few viewers are running their own clients, most are using gateways like Cloudflare and GameStop, and these are chronically overloaded.

Maybe dual-list on YouTube and IPFS, with a link to how people can get set up?