diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 4fac8cc72..49458f533 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -28,8 +28,9 @@ module ApplicationHelper
   end
 
   # MD5加密
-  def md5_encode(content)
-    Digest::MD5.hexdigest(content)
+  def edu_md5_encode(content)
+    return nil if content.blank?
+    "https://www.educoder.net/#{Digest::MD5.hexdigest(content)}"
   end
 
   def graduation_navigation graduation
diff --git a/app/views/users/videos/_video.json.jbuilder b/app/views/users/videos/_video.json.jbuilder
index eb5fafec5..f43b415da 100644
--- a/app/views/users/videos/_video.json.jbuilder
+++ b/app/views/users/videos/_video.json.jbuilder
@@ -1,6 +1,6 @@
 json.extract! video, :id, :title, :cover_url, :file_url, :play_url, :vv, :user_id, :transcoded
-json.play_url md5_encode(video.play_url)
-json.file_url md5_encode(video.file_url)
+json.play_url edu_md5_encode(video.play_url)
+json.file_url edu_md5_encode(video.file_url)
 json.play_duration video.video_play_duration
 json.published_at video.display_published_at
 json.created_at video.display_created_at