While I understand this is impressive work, my understanding of the FreeBSD-kernel on the PS4 is not enough to warrant some kind of understand -- Python, however, is my forte, and oh my... I think he hacked Python too! :)
As mentioned earlier, pv have been around for ages and does this "the right way" (tm). Also, as an exercise, spot the potential buffer overflow in this source in less than 10 seconds for extra credits!
Biggest drawback is that none of the commercial clients will implement support for it, that's what killed it for me (SecureCRT developer VanDyk told my company NOPE!) due to license issues :(