Update video.tsx

src/student/pre-register-active/video.tsx

@@ -83,7 +83,10 @@ export default defineComponent({
         if (item[0] >= startNode && item[1] <= endNode) {
           effective.push(item)
         }
-        if (item[0] >= startNode && item[1] <= endNode && item[1] >= endNode) {
+        if (item[0] >= startNode && item[1] < endNode) {
+          effective.push([item[0], item[1]])
+        }
+        if (item[0] >= startNode && item[1] >= endNode) {
           effective.push([item[0], endNode])
         }
         if (item[0] < startNode && item[1] > startNode && item[1] < endNode) {