Best Of
Re: Some Lecture videos lost sound.
Hi @SabaMtchedl256, Thank you for reaching out and sharing this issue with us! I suggest reaching out to Udemy's support team directly regarding this matter. They have the resources to investigate the issue and may be able to restore the audio for your lectures or provide you with further steps.
Make sure to add all information into the email you sent so the team has all details! To contact the team, please open the help center article here and click “Contact Us” on the right.
I hope this helps!
ElianaC
1