well here is a short overview on your cinematic, divided in a few sections.
Terrain and Eviroment:
Your terrain was not poor, keep in mind tho, with cinematics you might want to devote more time and detailing that you might do in a normal playable map, cause the viewer can only watch and not make an interaction with a unit.
Try to avoid using cliffs that blizzard provides, but use deformations instead for raising terrain, for you can put your own texture on them, and you can choose how steep the hill should be.
All in all your terrain is not bad, you just need to get an eye for detailing a bit more.
Try to use fogs for a more environmental specific setting, once you get to know how these fogs work, you'll see they can do wonders.
Camera motion and controls:
Your camera motions is for the biggest part fine, even tho you have some sqaure twitches, meaning you can see a bit too obvious that it's panning to another camera, your speed is fine btw, perhaps the use of faster camera's for a strike, this can help your attack look cooler.
Your placements are all a bit similar, try toying around with distances, offsets and angles of attack.
The last notion would be to use a bit more camera's as a whole, for the watcher is easily bored with a camera slow moving to the next one.
Story and Character build:
Your story so far seems a bit blunt, perhaps that because your cinematic is not finished, but there is no real story to hang on other than the fact that there are zombies that are killing people.
Gond had a decent character build, but then suddenly died, in which you go onto another character, this is a burden to your story, cause you have nothing to grasp on, basically all characters that are presented, die.
Try witting out your cinematic on paper first, to at least get a clear picture on how your cinematic is going to progress and what story parts need highlighting in your cinematic.
I am not going to trouble you with the spelling, but render it through a spelling checker, additionally see if you can find someone that speaks natively English to patch up your grammar a bit in places.
Anitmations and Interaction:
I liked the fact that you tried to use unit facing angles, to make sure people are talking to one another, keep that thought, what you have to keep in mind is that a human cannot turn his head almost 180 degrees (scene where Gond talks to Ragnar).
Other than that, youd want to have the units do a normal animation all the time, and not having them drinking a bottle of water whilst they almost being attacked, again this is precision that you'd want to include in your cinematic.
Music and Narration:
Well your music choice seemed felt like random choice of normal warcraft music, try searching for custom music, or at least when using wc3 music, fit right themes to the right scenario thats being played into your cinematic.
Narration: None, so not going to critique that
Hope this helps you in completing your cinematic
Regards