That is the worst assassination plan ever, really I have no idea how, out of all the possible plans this guy had, the "Charge through the whole army to murder a single commander." one won.
That was a really bad video, definitely not how an Assassins Creed game should be, it more like Dynasty Warriors: "America, F*ck YEAH!" edition, not buying the game if that is the direction they want to take it.
I guess they won't be doing the Ezio thing with Conner seeing how almost 40 years after America becomes independent they try and invade Canada and we all know how that went down