Hi there! I understand you're seeing the "no video with supported format and MIME type found" error when trying to play videos in the MeWe app on your Windows 10 device. Let’s work through this together to get your videos playing smoothly.

This error usually means the app or browser can't recognize or play the video format due to compatibility or missing support.

Could you tell me a bit more? For example:
- Are you using the MeWe app or accessing MeWe through a web browser on Windows 10?
- Does this happen with all videos or just specific ones?
- Have you recently updated the app or your browser?

Meanwhile, here are some step-by-step fixes to try:

1. Update the MeWe app or Browser:
Ensure you are using the latest version of the MeWe app if you’re using the desktop app, or update your browser (Edge, Chrome, Firefox) if accessing MeWe via web. Updates frequently add support for new video formats.

2. Clear Cache and Cookies:
Sometimes cached data can interfere with video playback. If using a browser, clear cache and cookies:
- On Chrome: Settings > Privacy and security > Clear browsing data.
- After clearing, restart the browser and try again.

3. Enable HTML5 Video Support:
Since this error relates to HTML5 video playback, make sure your browser supports HTML5 videos and hasn’t disabled media features. Most modern browsers support this by default.

4. Try a Different Browser or App Version:
Sometimes the issue is specific to one browser or app version. Test if videos play in another browser (e.g., Edge, Firefox) or on the MeWe mobile app if available.

5. Check Video Format:
If you’re uploading or sharing your own videos, ensure the file uses a supported format like MP4 with H.264 video codec and AAC audio codec, which are standard and widely supported.

If you’ve tried these steps or need more specific directions based on what you’ve tried, please let me know! We can then dive deeper or explore other settings.

Are you satisfied with this initial guidance so far?