“Where did you see the 2” of clothing at 15 feet spec?”
The Manual:
https://www.stunster.com/Taser-X26c-manual.pdf
The trick is that the charge is sufficient to penetrate clothing totaling 2 inches thick between the two barbs, not 2 inches per barb. Still, that’s gonna sting...
...and this is the Civilian Model. God only knows what the LE model does. I couldn’t find that spec in a hurry.
At 15 feet? From the manual:
"Be sure, however, not to fire at a subject who is over 15 feet or 4.5 meters away (measure 15 feet or 4.5 meters to see how far this is – it will probably be further than you think). If you do deploy at someone more than 15 feet or 4.5 meters away, the probes will not have sufficient TASER wire to reach the target"
From the video no one was within 15 feet, let alone close enough to penetrate a winter coat.