If anyone wants to recreate this exact demo on their own you can put together these 3 marketplace assets:
https://www.unrealengine.com/marketplace/en-US/item/155fca2ed82d4823b560985b07c6361a
https://www.unrealengine.com/marketplace/en-US/product/city-sample
https://www.unrealengine.com/marketplace/en-US/product/superhero-constructor
The superhero flight animations are really really good and even includes the blueprints for the flying movement character controller!