Embedded systems pushes the video stream to the cloud and pulls it from the cloud in 4G environments. Especially in remote update and debugging, there is so much interference that the system is not working properly. Therefore, we propose a kind of technology based on watchdog (commonly known as "watchdog"). This paper mainly analyzes how to make the system work more reliably in the process of using the state machine, the multiple threads and the remote update and so on, and this scheme applies to OMAP (TI's open multimedia development board) to make experiments. Test results show that it is effective to enhance the reliability of the 4G network video.