Whatever webm codec they are using to display the cutscenes is either seriously bugged or just doesn’t want to work well with the rest of the code. I have tried on two different computers and the cutscenes stutter, jerk and sometimes completely stop while the voice overs continue.
I know this is a problem with the codec or the integration of the codec with the game as I can play all of the cutscenes FLAWLESSLY on both computers in Firefox. Heck I can even have a bunch of them playing full screen at the same time and no stuttering. They play as smooth as butter.
I hope they get this fixed in the next patch because it’s annoying as hell.