Hi! I see you're encountering a "video playback error" and a black screen while trying to watch videos on the Weverse app. Let's work together to get this sorted out for you.

To start, can you tell me if this is happening only on your Windows device using the WebKit browser, or do you experience it on other devices or browsers too? Also, have you noticed if the problem occurs with all videos or just specific ones?

Meanwhile, here are some step-by-step solutions you can try on your Windows device to fix the black screen video playback error:

1. Clear Browser Cache and Cookies
Sometimes accumulated cache or cookies can cause playback issues. Clearing them for your WebKit browser can help.
- Open browser settings.
- Find the option for clearing browsing data.
- Select cache and cookies, then clear.
- Restart the browser and try playing a video again.

2. Disable Browser Extensions
Certain extensions like ad blockers or privacy tools can interfere with video playback. Try disabling all extensions temporarily and reload the Weverse site.

3. Try Incognito/Private Mode
Open a private browsing window, which disables extensions by default and uses a fresh session, then attempt video playback. This can help isolate if extensions are causing issues.

4. Update Your Browser
Make sure your WebKit browser is updated to the latest version as outdated versions might have compatibility issues with video playback.

5. Check Internet Connection
Ensure your connection is stable and fast enough. Streaming requires good bandwidth, especially for higher video resolutions.

6. Restart Your Computer
Sometimes a simple reboot resolves temporary glitches affecting playback.

If these steps don’t resolve the issue, we can look into more advanced troubleshooting such as checking specific network or account settings or any server-side issues.

Would you mind trying these and letting me know which steps you have already attempted or if something changes? That will help me guide you more precisely.

Are you able to try these now?