You'd be amazed - I've seen quite a few posts suggesting that Apple had somehow changed the lightning port to output analog sound as it was "impossible" to include a DAC in the plug as there wasn't enough room!
Oh, it's entirely possible to put a DAC in the plug - they can be amazingly small nowadays - but it's
also entirely possible for Apple to amend the Lightning spec (which was
designed for such future expansion) to add analog audio passthrough, if that's what they wanted/chose to do.
The other thing I don't see here is confirmation that the chips in question actually
are DACs (something like, for example, the model numbers on the chips being recognized as existing manufacturer's model numbers for DAC chips).
Reminds me of the very first Lightning cable teardown, when a random blogger pulled one one apart, found a chip in the connector, and,
expecting Apple to be evil, immediately declared "IT'S AN AUTHENTICATION CHIP! PROOF THAT APPLE IS EVIL!!1!." Based on
no proof, based on fear, ignorance, and pre-existing agenda. And
ALL the news media ran with this (because exciting Apple scandal), and now even Wikipedia lists this as fact, and it all traces back to that one blog post (with numerous stops along the way where people attest that it's true... because they heard it on the Internet). And yet, the chip in the Lightning cables is - and always has been - basically a microcontroller that handles the initial startup negotiation
necessitated by the Lightning standard, since the pin assignments are software controllable. The chip isn't there
in order to keep others from building cables, it's there to handle the protocol associated with the endlessly-reconfigurable Lightning connector. Does it keep some companies from making cables? Sure, probably. Is that it's
reason for existence? No, absolutely not. But the Apple-is-Evil conspiracy theorists win, because journalism isn't what it used to be. Smh.
Oh, hey, and it seems the video, yep, calls one large chip the DAC (they say they don't recognize the number, so how do they know it's a DAC?), and calls the other large chip, the "protection chip, just like other Lightning cables or adapters", indicating that they
don't actually know what they're talking about.
So, post-rant, the chip in the new headphones and adapter cable is
probably a DAC, subject to additional investigation/verification.