Does boxing have a different hook to MT/MMA?

That was a great video, thanks and welcome to MAP. I do have to disagree about trajectories, really every hook is unique in it's exact trajectory and there are a variety of useful hook trajectories in boxing. Some hooks are shorter, some are longer, some take a longer path and some are really, really tight. But some come out of nowhere at really odd angles, and those surprise hooks are without question knockout makers. The mechanics are pretty much the same though in terms of what you're trying to accomplish, though, maybe that's what you meant.

Here's a good example of what I mean, the feint hook is a pretty effective hook that isn't exactly like the orthodox hooks most people learn in boxing. Like most feints, it's devastating when done correctly. I'm not the best at technical explanations but basically, this is a feint, cross, diagonal upward hook combo that starts looking like a body hook but ends up really being a cross-head hook knockout blow.