Plague of Lordaeron was an undead campaign by Legion_King Doom.
When I first watch the prologue, I notice the camera was stiff once inawhile and when they moves; they're rather ugly as the movement was rather fast and inconsistent once inawhile. You should also fix the interface to undead interface rather than leaving it random.
You should also use game cache to load chapter 1 right away; instead of log back to the main menu.
Next comes the Chapter 1, I immediately notice KelThuzad ability was sharing the same hotkey. That's definitely a bad idea, I was trying to learn Banish by clicking the B button and I wound up learning Shadow Bolt. You should have fix the hotkey and never allowed a same command to share a hotkey; if you view any blizzard map; there is no command that share the same hotkey. Fix the Raise Skeleton and Death & Decay hotkey as well.
I could have sworn that I notice an grammar error in your quest description. It should be Destroy the human base at the southeast instead of to the southeast. Then again, I could be wrong about it.
The terrain at chapter 1 was decent; you did quite a good job in tiles variation and height. But it could be improve by adding some destructible/doodad like weed and flower at the field instead of just using tiles variation only. I notice the field at the north of the base lack of the natural beauty.
Next comes the difficulty issues, my god!! Invading Arthas base was like trying to broke an iron bar. The Villager Captain at Arthas based was hard to be killed due to the fact that most of my forces got to bypass Arthas troops before I managet to get close enough to kill the Captain.
Killing the Captain and getting the abomination doesn't make the game any easy either, I need to try various trick before I finally breach his defense. I try to use 1 dozen necromancer and a bunch of abomination + wagon to breach the defense and it doesn't work as the priest constantly dispell, rendering those massive amount of skeleton to be useless.
It was only a full scale of abomination and placing a blight at combat area that finally contribute to the victory (I even run out of gold mine at 3 places before I manage to breach the defense). As much as the difficulty proceed, it was way to hard for chapter 1; you should ease the difficulty.
Next came chapter 2, I notice the camera often move and stop, move and stop. You should have always let the camera move slowly especially during an conversation.
The only thing annoy me was making the shortcut as cutting the tree takes time, but I doesn't see anything wrong with chapter 2.
As for chapter 3, it was way too short that I do not have enough time to go outside the base to expand the base and neither killing the creep since both human sides would keep me busy till the 15 minutes are up. To top up with, purchasing the zeppelin to explore the entire map in within 15 minutes seems to be impposible. If there is any optional quest in this chapter, it would be a total waste.
And you should set everybody invulnerable or pause when the game end, so the cinematic execute. The other unit would not combat against one another.
When the 15 minutes are up, my base was attacked and the mage cast blizzard at my base. During the cinematic sequences, I could hear the combat sound of my unit and the blizzard. If you view any wc3 campaign, they often set the unit invulnerable or pause the unit once an require quest was accomplish.
For chapter 4, the difficulty was way too easy. All I gotta do was wait for Arthas to attack and once he is killed, I retaliate by sending a group of crypt fiend right to it.
When I was playing chapter 4, I had been afk for awhile after destroying Arthas structure (I do not destroy all of it) only to find out that Hadronox die all of the sudden and the quest complete by itself.
I also notice some cinematic message was too long and yet the time was too short to read it, you might want to fix it.
For chapter 5, I was wondering why do you even add marketplace since it was pointless.
The epilogue cinematic was poorly done, but I won't be commenting about this cinematic issues.
Overall, the campaign still have lot's of issues that need to be sort out. It ain't that bad, but it ain't that great either and doesn't have any errors that completely bug the campaign.
This resources are ready to be approve, but it still isn't ready to be recommend to everybody until the author itself fix most of the errors. My rating was 3/5 (Useful).