Obfuscated pointers. Possible?

[happybeing]

Earlier take on the same question:

Streaming private data to 3rd party

Imagine I would have a video streaming service (I dont have and will not have…) which would allow customers to rent videos to watch. I could do it by uploading videos as private files and when someone rents it, route the stream throught my server to the customer. But would it be feasible to implement a way to use my private keys to open the stream directly from nodes to the customer, so I would not need to route it throught my server?