图片模式时，封面图使用uiimageview渲染

BFRecordScreenKit/Classes/RecordScreen/View/Cell/BFImageCoverViewCell.swift

@@ -55,7 +55,9 @@ open class BFImageCoverViewCell: UICollectionViewCell {
         super.init(frame: frame)
         contentView.addSubview(playView)
         contentView.addSubview(playBtn)
-        contentView.addSubview(playImageView)
+        if(recordItem?.mediaType == .Image){
+            contentView.addSubview(playImageView)            
+        }
     }
 
     public required init?(coder _: NSCoder) {