This type of food engagement is basically “really fun luring”.

You can experiment with different ways to have your dog chase the food in your hand:

• running away with your back to the dog
• running away with your face to the dog
• moving your hand around in circles
• combining food chases on the ground and chasing the food in your hand …

Pay attention to your dog: Which one does he like the most? Do more of those variations that he really enjoys.

I personally do not use a cue for either type of food chasing. I might say “get it” or something else motivating (or just random blabla like I do in the video 😉 ).
However, if you want to introduce a verbal cue for this, you certainly can do so!