diff --git a/docs/sample.md b/docs/sample.md
index 4add086157386a3fd55ec0460afc16f3da7e0e7d..cc546f849a9b1d436a37fa3ced56ecbb7e432b7d 100644
--- a/docs/sample.md
+++ b/docs/sample.md
@@ -1,3 +1,9 @@
 <figure class="video_container">
   <iframe src="https://drive.google.com/file/d/1kpHR52omZKpas0OHfaUfkPKdYPpTJkQD/preview" frameborder="0" allowfullscreen="true"> </iframe>
-</figure>
\ No newline at end of file
+</figure>
+
+<!-- blank line -->
+<figure class="video_container">
+  <iframe src="https://www.youtube.com/embed/enMumwvLAug" frameborder="0" allowfullscreen="true"> </iframe>
+</figure>
+<!-- blank line -->
\ No newline at end of file