Just another outsider looking in here....I'll admit, when I first saw the title of the thread and the clip, I was initially wondering why it was posted here, as no, it had nothing to do with any of the Kans. But, after more thought, I'm guessing that because people feel that a) there is no ground fighting/grappling in any Kan or b) that there is, but it'd be beneficial to view a grappling based art, and perhaps add some tools from Judo to Ninjutsu.
This may simply be a misunderstanding, but again, I can see where the confusion lies. So, if its b, in an effort to prevent this thread from turning into a crap fest and me and the other mods getting headaches, lets not turn this into a Ninjutsu sux thread, but instead perhaps make a comparison to the grappling that we see in the clip, vs the grappling that we see in a Ninjutsu clip.