I imported several mp4 videos to a project. These videos have sound but I want do publish the project without it. Is it possible? I’ve already tried to uncheck the “include audio” on preferences.
Audio is included, embedded in the MP4. To take the audio out, you'll need a video editor like Premiere Pro.
Suspect you want to reduce the file size. You can always mute all audio by using the system variable cpCmndMute but that will not reduce file size, just mute the audio.