You can tell he's squinting hard. Every hunter eyed model who gets posted on the internet squints, but only a little. The goal is to at least partially cover the upper eyelids and bring your eyebrows as close to your eyes as possible without making it obvious you're squinting/furrowing.
Obviously squinting with subhuman bug eyes won't give you hunter eyes, but if you're white chances are you can fake hunter eyes like the guy in OP because whites have naturally deep set eyes and fatty upper eyelids.
I can fake hunter eyes like Nick, but I always have to focus on it.