Hi! I see you're encountering the error message "There was an error playing this media" when trying to play videos in the Substack app on your Android device. I'd love to help you get this sorted out.

To start, could you let me know if this happens with all videos, or just specific ones? Also, have you tried any steps already, like restarting the app or your device?

Meanwhile, here are some common steps that often resolve this issue on Android 10 with WebKit browsers:

1. Check Your Internet Connection: Ensure you have a stable internet connection (Wi-Fi or cellular data). Try switching to a different network to see if the video plays.

2. Update the Substack App: Head to the Google Play Store and check if there’s an update available for the Substack app. Sometimes video playback errors are fixed in recent versions.

3. Clear Cache and Data:
- Go to Settings > Apps > Substack.
- Tap on Storage.
- Clear Cache first, then Clear Data.
- Restart the app and try playing the video again.

4. Restart Your Device: Sometimes a simple reboot can fix temporary glitches.

5. Check for System Updates: Make sure your Android OS is up to date. Go to Settings > System > System update.

If you’ve tried these already or the problem persists, I can guide you through more advanced troubleshooting or check for any app-specific issues that might be causing this.

Let me know what you’ve tried so far, and if you notice the problem on specific videos or all of them!

I've tried all these above solutions, but none have worked. Substack is the only app where I have this problem.

Thanks for letting me know that you’ve already tried those steps and that Substack is the only app where this issue happens. That really helps narrow things down.

Since the problem is specific to video playback in the Substack app on your Android 10 device, here are some next-level things we can try:

1. Reinstall the Substack App: Sometimes app files get corrupted. Uninstall the app completely, then download and install it afresh from the Google Play Store.

2. Disable VPN or Proxy: If you’re using a VPN or proxy on your device, try disabling it temporarily. Sometimes these can interfere with video streaming.

3. Check for App Permissions:
- Go to Settings > Apps > Substack > Permissions.
- Make sure the app has permission to access storage and network, which can affect media playback.

4. Test Video Playback on Substack Website: Using your Android WebKit browser, try accessing the same videos via the Substack website rather than the app. If they play fine there, it confirms the app as the issue.

5. Check for Known Substack Issues: It's possible there could be a temporary app or server issue. You can check Substack’s status page here for any ongoing performance or video playback issues.

If none of these work, the best next step might be to contact Substack’s specialized support by emailing [email protected] with details of your device, app version, and error message. They can look into any backend issues affecting your account or device.

Let me know if you want to try any of these or need help with the steps! Are you satisfied with this guidance so far?