https://www.chess.com/analysis/game/live/65301801867?tab=review
why is h4 brilliant
The Brilliant move classification can be a bit wonky.
Even though h4 in that position is practically forced, the move still meets the criteria: it is the best move/nearly best move in a position, and it "sacrifices" material. Playing h4 allows the knight to be captured so the algorithm is considering it some kind of material "sacrifice".
https://www.chess.com/analysis/game/live/65301801867?tab=review
why is h4 brilliant