Regarding iOS 10, you can't send videos by SMS on WeChat QQ. Ask for advice.

I can't. When the screen of Apple's mobile phone iOS 10 is locked, drop down the screen and open the "Notification Center" to view various notifications, such as SMS, QQ and WeChat, and reply directly. ("Direct reply" means that when Apple locks the screen, it pulls down the screen, opens the "Notification Center", clicks the notification to unlock it directly, and then enters the application interface to reply. )