Solution:
When you use wireless network at home, open the Mi TV Settings to select the network, search the network and connect, then press the "Home" key to return to the main interface, click "Online Video" to enter the page;
When you have a wired network at home, plug the cable into the RJ45 Ethernet interface on the back of your TV, then press the "home" key to return to the main interface, and click "Online Video" to enter the page.
When you use wireless network at home, open the Mi TV Settings to select the network, search the network and connect, then press the "Home" key to return to the main interface, click "Online Video" to enter the page;
When you have a wired network at home, plug the cable into the RJ45 Ethernet interface on the back of your TV, then press the "home" key to return to the main interface, and click "Online Video" to enter the page.