First, you have to be a channel administrator, and then right-click the channel, and there is a channel information and a channel template. Select an education template to enable it. After coming out, there is a setting on the right, plus the yyID of the lecturer. After that, there is another class on the right. There is a toolbar after clicking, and you can give lectures according to the prompts. You open the ppt and drag the selected video frame to the content of the ppt.