Aside from a couple of brief moments, those clips don't sound that Deftones-y to me. They've never been ones to play on a genre as blatantly as that and I don't see them starting now.
You make a good point.
I don't think it's outside the realm of possibility Deftones recorded a track with that blackgaze metal vibe. I think of something liked 'Doomed User' being sonically different than anything else they've done. Then again, these new clips are a much more extreme departure from
anything they've ever recorded. All in all I probably agree with you on that track.+
I still believe the first clip we heard is likely Deftones though (16 second one). It sounds like a classic Deftones ending with the guitars and drums crashing together (endings like Change, Tempest, P/T, Error). Regardless, it's awesome to know there is something brewing. Whether it is Palms, Saudade, Deftones or something else entirely I am stoked!