I don't think AES or video decoding uses coprocessors or FPGAs, that's just implemented more or less like any other instruction. If you're going complete copro

I don't think AES or video decoding uses coprocessors or FPGAs, that's just implemented more or less like any other instruction. If you're going complete coprocessor, you can do much more like Apple has done with their motion coprocessors or the secure enclave.