Mobile phones and TVs are not connected to the same wifi, so devices in different networks cannot play wirelessly. Please wake up and turn on the TV before searching for TV equipment. Turn off and restart the phone and TV, and then try to play wirelessly after restoring the network settings.
Check the network. Youku and the screen projection equipment are in the same LAN to project the screen. It may be that the copyright is limited, and some content is protected by copyright, which only supports playing on Youku client. Equipment operation error. Try restarting the screen projection device and mobile phone, and then project the screen again.