There are Shutterstock, Getty, Pond5. But is there a web3 alternative? I can mint an NFT for each video, but it cost a lot of money so it doesn't make sense to do that. Probably it makes sense to mint an NFT on demand when there is a customer that want's to buy a video. Other challenge is a storage. There is still no a good decentralized cheap storage. IPFS still requires a host.
Have you seen such marketplace that doesn't require a creator to pay in advance but be able to sell their content in a better price?
I'd love to hear the issues you have with something like https://web3.storage/ and how it can be improved.