Warm-up your voice at home before rehearsal and performances – you might like to try the following YouTube videos:
by In Unison Music Lessons. A short, fun piano accompanied warm up with a visual Do-re-mi staircase with bouncy ball and trampoline. No spoken instructions; sing as a hum, an “ah” or a “la”.
by Verba Vocal Technique. A 5 min piano accompanied warm up, talked through by a friendly female teacher.
by Esse’s Vocal Studio. A 7 minute warm-up. 5 simple and easy to follow exercises accompanied by piano, guided by calm female voice.