2 things: 1) technical -- i live just inside the back-of-the-beyond, effectively. Which is to say, our location gives poor reception for videos like this one. It took about 10 minutes to get to the end, playing 2 and 3 second bursts with 5 to 10 seconds between the bursts. I've watched a lot of NatGeo short videos (let's face it: yawl do good work, and your videos are a naturalists dream come true -- except on this one for technical reasons.) Is there something about the video format which makes it extra susceptible to reception problems?
2) The video says that Vampyroteuthis lives below half a mile deep, that it has large eyes -- i assume this means comparable to it's size, and i assume that their eyes are smaller than our eyes. I note that our eyes are quite good in dim light here on the surface of our world. Half a mile down, however, all the longer wavelengths of light have been filtered -- leaving only UV light.
http://oceansjsu.com/ says that only 0.0062% of the surface light reaches a depth of 200 meters, and that UV dim blues and greens are what's visible at half a mile or more.
Do you know if anyone has studied Vampyroteuthis in UV light? i ask because the video say that this inside-out behavior may make them look dangerous because of the "spines" (which are really soft touch receptors for inside their tentacle webbing)
I think that UV light would provide the only visibility at that depth, and that this inside-out behavior would only work for those which could see the shape, AND had previous visual experience with spines. So, does Vampyroteuthis have an ability to create UV patterns like squid do? Bright enough to be seen quickly by rapidly swimming predators?