I am also faced this issue, I tried the above solution and solved it. Thank you!

Hello everyone, I am facing a strange issue. Recently I have downloaded a video from a specific site. But it has downloaded to a WebM format. Now I want to convert it to Mp4. Can anyone suggest me how to convert the video to Mp4 format? Any suggestion would be definitely appreciated.

Thank you so much for reverting back. I am able to solve the issue from this article https://silicophilic.com/how-to-convert-webm-to-mp4-using-vlc, it easily solved the issue that I faced earlier.