I assumed the secure enclave was an encryption / decryption processor. But isn't QuickSync part of the Intel GPU - I thought hardware video encoding and decoding were done by the GPU?
Secure enclave is more akin to the TPM. It stores some secrets even the OS can’t access, including your fingerprint/face biometric.
QuickSync is a dedicated hardware on the SoC die, not part of the GPU, but even if it were, it is just semantics if it is still on the same die.