Even though it uses the game's engine to produce the cutscenes(besides the planet transition and ship based ones) there is a long loading screen in the middle of a cutscene if they are not in the same area as you(which is basically the only time you have cutscenes of the sort).
Just on one cutscene on Nar Shaddaa before you go after one of the bosses I counted four loading screens(of which most of the scenes you loaded an area to see were less than 30 seconds).