Please follow the below steps:
1. Confirm the network has access to the internet. Switch to other networks for testing.
2. Open other videos and confirm whether these can load normally; if yes, the issue might be caused by the video source.
3. Reboot the phone and try again.
4. Check if the application or system version is the latest. If not, please upgrade.
5. Uninstall and re-install the application.
6. Back up all the data and then restore factory settings.
If the issue persists, contact the Nothing Support Team for further assistance.