What vocal warm ups do you recommend? https://www.youtube.com/watch?v=GOvhPtJ7VVo&t=1s -Dots Singing, 5 Minute Vocal Warm Up https://www.youtube.com/watch?v=sVEIeIMiOEE -Dots Singing, 9 Minute Vocal Warm Up https://www.youtube.com/watch?v=YCLyAmXtpfY&t=124s -Jacob's Vocal Academy