Thank you for your asking. I just tested my device in V432 with cable earphones yet I didn't encounter the same issue. The sound performs perfectly with stereo sound in Youtube. Kindly try some stay-at-home troubleshooting tips below:
1. Change another earphones.
2. Please try to enter "Safe Mode". If the function works well in Safe Mode yet the issue remains out of Safe Mode, please check on any disturbance from the installed 3rd party apps.
# How to enter and exit "Safe Mode"https://www.asus.com/support/FAQ/1005163/
3. Also, please try "the Factory Reset"
Settings>System>Advanced>Reset options>Erase all data(factory reset)
Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.