I checked the original videos that came with the game and they are 512x336. (Aspect Ratio = 1.5) The PS2 ones use the same aspect ratio as well. He didn't make a mistake.
I agree, I hate drastic changes, but I can live with the little ones he made.The HD Game Models one looks interesting, but I dont like how he strayed too far from some of the original concepts of the game (such as the herb mixture icons, I think they look bad in the tube form on your inventory). I wish more people would follow Albert's lead, and improve on the game using the existing assets as a base, and not to modify major things too far from the original. I think thats the way to go.
These are two other mods I like:
Viper Snake's Hair for Leon
Viper Snake's Hair for Ada
Too bad Viper Snake quit modding RE4 and didn't make improved hair for Ashley..