you posted some audio content which is owned by Sony as yt tells you on the screenshot
so you either have to remove the video and select another background music and upload it again with the new background music, or you need to alter the music until they can't detect that it's belongs to Sony
they're using some bad-ass technique to recognize songs now, so it won't be as easy as it was, but i guess it still can be done
search the forum, i'm pretty sure you can find tips how to make songs unrecognizeable to yt (slowing down a bit, stretching particular parts etc.)