多项选择题
(Multiple choice questions) The following statement about video is correct: ()
A．If automatic playback is enabled, the player can be set to muted status. In this way, when playing automatically, it will be muted to prevent users from getting bored.
B．Img is used in video to display the video cover
C．loop property can make the media file play in a loop
D．Multiple source elements can be added, and the browser will choose to play the first file it supports
