那么“视频”方框就会呈灰色。{"smallUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/9\/92\/Delete-All-Media-on-WhatsApp-Step-25-Version-3.jpg\/v4-460px-Delete-All-Media-on-WhatsApp-Step-25-Version-3.jpg","bigUrl":"https:\/\/www.wikihow.com\/images_en\/thumb\/9\/92\/Delete-All-Media-on-WhatsApp-Step-25-Version-3.jpg\/v4-760px-Delete-All-Media-on-WhatsApp-Step-25-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":760,"bigHeight":570}1打开WhatsApp。打开WhatsApp的“设置”页面。