But you've still got to shuttle that data to the browser and it has to be decrypted on the GPU. I think you'd be hard pressed to find that anywhere in the wild.

But you've still got to shuttle that data to the browser and it has to be decrypted on the GPU. I think you'd be hard pressed to find that anywhere in the wild. Modern CPUs can decrypt AES with specialized instructions at a rate that's practically measured in GB/s. Especially for streaming video that doesn't need to decrypt the full stream at once (and where you're probably already using the GPU to, you know, render the video) why would you use the GPU for AES?