We use warm-ups to improve our technical playing on our instrument. Different warm-ups help us improve different parts of our playing. Long notes improve our sound and scales improve our finger movements. We can use warm-ups to practice getting better at tonguing, slurring, dynamics, holding our instruments correctly and anything else that we want to improve.
These daily exercises will help improve your high note playing
Have a look around the 2 flute loops youtube channel for more vidoes