fix

public/react/src/modules/courses/Video/video-play/index.jsx

@@ -14,7 +14,7 @@ function getTotalEffectTime(pos) {
   pos.sort(compareNumbers)
   let sum = 0
   for (let i = 0; i < pos.length - 1; i++) {
-    let v = pos[i + 1] - pos[i]
+    let v = Math.abs(pos[i + 1] - pos[i])
     if (v < 21) {
       sum += v
     }
@@ -115,6 +115,7 @@ export default ({ src, videoId, logWatchHistory, courseId = null }) => {
     }
     //循环播放， 累计时长不能清空
     async function onEnded() {
+      pos.push(el.current.currentTime)
       log(() => {
         logId = null
         lastUpdatedTime = 0
@@ -180,6 +181,7 @@ export default ({ src, videoId, logWatchHistory, courseId = null }) => {
       el.current.removeEventListener('seeked', onSeeked)
       el.current.removeEventListener('timeupdate', onTimeupdate)
       if (el.current.playing) {
+        pos.push(lastUpdatedTime, el.current.currentTime)
         log()
       }
     }