It did it for teh lulz, and thus why it has so many errors, basic crap, and other such annoyances. I did video editing many, MANY a year ago, and I've lost -all- my skill, so I'mma re-train!
Silver-Haired Girl - Saikah
Dark-Blue Haired Boy - Akio
Brown-Haired Man - Masataka
Red-Haired Samurai - Kenshin
Red-Haired Girl - Ayano
Blue-Haired Chick - Ama/Kenshin's Zanpakuto spirit
Evil laugh at teh end - Byakko
..and of'course, Byakuya, Ichigo, and Rukia-chan.
V2: Version two will have everyone else, better updates, and errors fixed.