There can be too much detail in a Warcraft III cutscene. But while Blizzard never used is you can use Depth of Field in your custom maps…
Code
Melee Initialization
Events
Map initialization
Conditions
Actions
Camera – Apply Camera 001 for Player 1 (Red) over 0.00 seconds
Visibility – Create an initially Enabled visibility modifier for Player 1 (Red) emitting Visibility across (Entire map)
Cinematic – Turn cinematic mode On for (All players)
Camera – Set camera focal distance to 170.00
Camera – Set camera depth of field scale to 100.00