bug fixes

learnOnline/pages/learnSystem/courseContent/courseContent.js

@@ -130,7 +130,7 @@ Page({
           }
           for (let k = 0; k < children.length; k++) {
             const item = children[k]
-            if (item.vid && json.headerInfo.id) {
+            if (!json.tabs1ChapterList.currentChapterId || item.vid === json.tabs1ChapterList.currentChapterId) {
               this.setData({ latestVideo: item })
               break
             }