What you need to know
Audio may be blocked by autoplay policy, a muted player, or an MP4 file that has no audio track.
Step by step
- Play the uploaded original video locally and confirm it has sound.
- Check the browser tab and player mute settings.
- Start playback with a user click if the browser blocks autoplay with sound.
- Check the video player and any Google IMA ad-manager volume settings.
- Try another browser to isolate the problem.
Tips and common mistakes
- An XML tag cannot create audio if the video file has no soundtrack.
- Some browsers allow autoplay only when muted.
Need more help? If a player rejects your tag, check the VAST Testing Lab and the developer troubleshooting guide. MEDIARAZZI serves the ad; your video player determines when it plays.