Tutorial by: ECAbrams
Sometimes you just need to learn some simple techniques that can help you take your footage to the next level. ECAbrams is an amazing instructor, and breaks down this effect beautifully. He also provides footage that you can download!
From the instructor:
Using only footage and simple compositing techniques, we'll zoom into an actor's eye, and enter an abstract effect shot. This is a great transition when showing a character's inner thoughts, isolating the subject they're looking at, and really enhance a scene.