How does Xiaomi 5c make video calls? Does the other party need Mi Tu?

If Xiaomi 5C wants to make a video call to Mi Tu, he needs to download Mi Tu from the mobile APP, and then connect to send a video to make a call.

Click the+button in the "Chat" interface of the APP, and then click the "Video Call" function button. If it is the first time for a mobile phone to use the video calling function, you need to download a video calling plug-in, then click the "Video Calling" function button to send a video calling invitation to the watch, and then click the "OK" button in the pop-up dialog box to download the video calling plug-in. After downloading the plug-in, click again. You can send a video call invitation to your watch. When the watch receives a video call invitation from the mobile APP, click the answer key of the watch to start a two-way video call.