IPFS Store provides the service you are looking for, and accepts crypto (BTC) payment. Just right click -> copy video address to find the hash of your IPFS video and you can pay already today to get it hosted for years.
Eventually, there will probably a button on the video page for people to 'extend' the hosting via payment, once we have a good way to manage active keys, such as SteemConnect
The latter option is what I wanted to hear. Thank you for your work!