短视频与直播的本质区别是
The essential difference between short video and live stream is  A.
视频播放时长上的不同 
Differences in video playback duration B.
视频内容的类型不同
different types of video content C.
拍摄视频的方式不同   
Different ways of shooting video不同    D.
演绎视频内容的主题不同
different themes of video