What you need to know
A black player may indicate a missing or unsupported video, a player integration problem, or a blocked playback request.
Step by step
- Open the commercial preview and check that the video itself loads.
- Verify the VAST URL returns an XML ad containing a MediaFile URL.
- Open the MediaFile address in a browser to check basic reachability.
- Use a real player test to inspect error events or the browser console.
- Check whether the player requires a user click before playback.
Tips and common mistakes
- An empty HTML5 preview does not fully test VAST.
- Do not disable security checks or expose private storage keys as a workaround.
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.