Well...
I've already commented Part I.
I totally agree with the idea of making background explanatory cinematics. Makes the story more complete.
About part II...
-Dialogs seem better than in part I. They're shorter, but they still help to understand the story. And you kept the Captain's funny replies. I guess he has an important part in your campaign...
One other point abour the Captain: at the end, he calls Melana by her name. Strange. I was expecting him to use a nickname, like he always does. Something like "lass", "blondie", or "cutie"...
-About the forest... the city Castor, Melana and the Captain have to reach seems important, since it is only there that you can be exempted from military service. So, why do you have to cross such a thick, dark swamp forest to reach it? Over the years, people might have built proper roads and paths to get there without troubles.
Unless the city is a foreign place, so the Empire can not claim conscripts from there. In which case: Are you sure a soldier (even a light-dressed blonde mage) can tread that easily in foreign territory?
-About the undeads...
First, when the undead army is showed, the zombies are sleeping. Take care of that. It just involves a checkbox in the unit editor.
Then, the two skeleton guards were THAT easy to 'kill'? (or un-resurrect, to end their un-death
).
What's the point of guarding the prisoners, since they're able to kill single-handedly the guards? (not to talk about the escape plan: "Hey! I'll taunt the guards, so they'll try and kill us!" but I suppose it's part of Castor's way of thinking)
Finally, I was rather disappointed by the fight against the vampire lord. I was expecting something more epic, to match the huge apocalytical battle between army men and undead. I just got a short vampire slaughter. Apart from a quick teleport and some random claw strikes, the vilain is not giving much of a struggle, for someone able to raise an army of undead...
-About the imperial army. Well, the Garithos' character (I don't remember his name) is a general. It stands to reason he has a large force under his command. It seems logical too he needs at any cost to rescue a mage as mighty as Melana. But sending the whole army to defeat the undeads? If it was supposed to work, why did he wait that long to cut down the undead threat?
Unless Melana was essential to victory, in which case it would be better to explain it. It would also explain why he and his men go to fight so impulsively...
Apart from that, it is quite a nice cinematic. I really like the layouts (like for the previous part). I await the third (and perhaps last) part, as well as the campaign...