I don't think he alluded to breaking / cracking the encryption. Decrypting messages is not that same thing as breaking encryption. In fact he demonstrates how W

I don't think he alluded to breaking / cracking the encryption. Decrypting messages is not that same thing as breaking encryption. In fact he demonstrates how Whatsapp have done things properly and at the same time demystifies how the whole thing works. He doesn't actually explain end-to-end encryption, but only indicates that that is the mechanism used to transfer the secret key from the sender to the receiver.