How is that knight move a brilliant move?

https://www.chess.com/analysis/game/live/65874783055?tab=review

Can't find any reason apart from it is attacking the kingside. Someone explain?

threatens mate if black takes the bishop thats what i see

• So, here's what I saw (I'm low ELO, so take this with a grain of salt)
  
  
  • protects h6 bishop
  • threatens g7 pawn, and the knight cannot be taken, then the knight can move to e6, forking the rook and queen
  • moving it to d6 could bait a queen take, allowing the pawn on e5 to take
  • moving the knight to e3 could bait him into capturing it, allowing you to take the knight back and develop your queen
  • it trades knights if he decided to defend with knight to e7
  • it protects d4 pawn, which if taken by black's queen, could check you

Doesn't look that brilliant. You sure your engine isn't bugged?

The definition of brilliant move on chess.com is a sacrifice that works, more or less. It might be a little more complicated, but that is more or less it. This move is in line with that definition.