Add some comments

we-com-server/src/main/java/com/tzld/piaoquan/wecom/job/WeComMessageDataJob.java

@@ -177,6 +177,7 @@ public class WeComMessageDataJob {
 
     private List<List<Long>> combinedVideoList(List<Long> videoIds, int count) {
         List<List<Long>> res = new ArrayList<>();
+        // 此处假设视频的打开率与上下文无关，只保证每个视频在每个位置都有发送
         for (int i = 0; i < videoIds.size(); i++) {
             List<Long> list = new ArrayList<>();
             for (int j = 0; j < count; j++) {