Please try the following:
1. Check if your device is connected to the internet. Switch to other networks for testing.
2. Open other videos and check if they load normally. If yes, the issue might be to do with the video source.
3. Reboot your phone and try again.
4. Check if the application or system version is the latest. If not, please upgrade.
5. Uninstall and reinstall the application.
6. Back up any important data and restore your phone to factory settings.
If the issue persists, contact the Nothing Support Team for further assistance.