The accident aircraft almost certainly had a radar altimeter, which is what drives the altitude callouts (not the baro altitude). Regardless, the landing sight picture is primarily driven by visual references, not instrument indications -- ILS category 3 landings (without visual reference to the runway environment) require autoland.
From what little we can see in the very beginning of the clip (look at the first frame), the approach appears normal until the nose drops sharply. The landing seems to definitely be nosewheel-first, with subsequent overrotation leading to a tail strike.
I didn't pick that up. I thought the bird started out nose-low. There's a big freeze-and-jerk at the start of the video ... I had to replay it about a dozen times to actually see the first second or so of video. But yeah, looking at it again, attitude looks normal in the first few frames, then she suddenly pitches nose-down, then as far as I can tell from blurry pixelated video: nose gear hits first, nose rebounds, LOOKS like roll to left begins there, main gear and left wing hit together with nose still rising, tail strikes as left wing starts to dig in, airframe begins to roll hard over to left, fuel ignites as left wing tears off just inboard of the left engine pylon, roll continues, right wing appears to fail just outboard of the right engine pylon as the bird rolls past about 120°-130°, nose impacts the ground again pretty much cockpit first as roll goes through about 150°, airframe commences sliding somewhere between there and completely inverted.
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From what little we can see in the very beginning of the clip (look at the first frame), the approach appears normal until the nose drops sharply. The landing seems to definitely be nosewheel-first, with subsequent overrotation leading to a tail strike.
Lots of possibilities here.
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