The issue might be caused by the following reasons.
- The video needs some time to load. Please make sure your network is connected or use a different network (Wi-Fi or3G/4G/5G).
- Some ads would move to a freezing state after watching. You can still watch the video after the freezing time.
- Some ads have an upper limit for watching. If you exceed the limit, please come back to watch the video tomorrow.
- The ads are provided by the ad system and sometimes there are no available ads in it. Please wait for some time and the videos would come back.
- Sometimes the issue might be fixed after you reopen the game.