Not seen one missile, ten-twelve targets?
Things may not be as they first appear. "Confetti" is, in some cases perhaps, an apt word. In a few of those videos (from yesterday evening) those weren't missile payloads in a (near-)nominal, (semi-)controlled terminal phase of flight, but post-interception debris showers (and likely some in-flight failures too). Some of the warheads
may have failed (or been disabled/disrupted), there
might not even have been warheads on some (purely kinetic strike, as at least one crater near Mossad HQ
might evidence), and those that were armed
appear to have been relatively low yield (quite possibly, many of the missiles were on depressed trajectories, so compromising their throw weights). Another
possibility is that part of the shower comprised decoys/penaids (if only by increasing the number of inert projectiles launched, rather than by design, perhaps).
Meanwhile, from the other end… (note early boost phase RUD, possibly multiple; at least one failed motor fell on NE Iran):
(Comment from flight crew): "Filmed from flight deck of an airliner near Shiraz, Iran. No warning from ATC who had no idea. Turned away immediately."