Let’s look at the conclusion first
Usually do not turn on mirroring when looking directly at the phone screen; only turn it on when using a reflective glass teleprompter board. The countdown can be set from 0 to 60 seconds to allow time for shooting and posture adjustment. Looping is good for repeated practice, but constant speed is different from how the AI behaves at the end.
Setup instructions
Usage suggestions
Before recording, run through the short draft to confirm the mirror direction, countdown length and loop behavior. Close the loop when there is no need to repeat it for formal shooting to avoid accidentally returning to the beginning after reading.