For You vocals?

Okay to start, I love the song For You. It’s an amazing song, but what is up with that kid? Like the kid who says “For you” does not sound like he’s saying that, I hear “rain-boo” maybe I’m just deaf but since I started listening to that song almost 3 years ago that’s all I heard but I looked at the lyrics and it says that that child says “For you”. I’ve looked on the music video and no one seems to notice and I’ve never heard anyone mention it so maybe it’s just a me thing? Would love some input