I'm telling you your ear lacks the sophistication to hear why it is a good performance. You don't understand they are using a lot of suspended chords that could sound "off key" to someone like you but sound pretty amazing actually to someone who knows what they are doing. Don't worry about it. it's okay. Have a good weekend.
I think you are confusing slightly more complex chordal harmonies for "off key." At what point in the video do you hear it (minutes and seconds?)
Listen to the backup singers
I'm telling you your ear lacks the sophistication to hear why it is a good performance. You don't understand they are using a lot of suspended chords that could sound "off key" to someone like you but sound pretty amazing actually to someone who knows what they are doing. Don't worry about it. it's okay. Have a good weekend.