Does anyone know of any good video sites which cater for.

4k video
High Bitrates (>30 MBPS)
Higher than 30fps?

Does not need to be all 3.

Vimeo and Youtube are on the cusp of being unacceptable for various reasons.

Shame none of them has the brains to realise there's a market out there of people who would pay money for a better service.