The Cryptography video from Security+ doesn't clearly discuss the distinction between quantum computing and quantum cryptography. The former is crypto-relevant but still theoretical, and it's talked about a bit with the possible ability to crack crypto. Quantum crypto doesn't seem to be mentioned directly, though it's indirectly mentioned when discussing polarization measurement. Quantum crypto is very real.
If the course is updated, I suggest a bit more distinction and focus on what quantum crypto actually does (using measurement of entangled photons, along with a conventional-channel transmission of the way in which to make the measurement, to securely exchange new information which can then be used as a key).