diff --git a/README.md b/README.md
index 7f5b5af..167c107 100644
--- a/README.md
+++ b/README.md
@@ -10,8 +10,10 @@ This is a Hexapod project.
 
 You can use any mobile phone (iOS or Android) to control the movement of hexapod (move foreward, backward, etc...).
 
-See demo video - https://youtu.be/NJ7DdDEcq3U to get the idea.
-<a href='https://youtu.be/NJ7DdDEcq3U'><img width=480 src='http://img.youtube.com/vi/NJ7DdDEcq3U/0.jpg'/></a>
+See demo video: https://youtu.be/NJ7DdDEcq3U & https://youtu.be/To2Y6Mhu-CE to get the idea.
+
+<a href='https://youtu.be/NJ7DdDEcq3U'><img src='http://img.youtube.com/vi/NJ7DdDEcq3U/mqdefault.jpg'/></a>
+<a href='https://youtu.be/To2Y6Mhu-CE'><img src='http://img.youtube.com/vi/To2Y6Mhu-CE/mqdefault.jpg'/></a>
 
 > More videos can be found at https://smallptsai.github.io/hexapod-web/
 
diff --git a/README_tw.md b/README_tw.md
index e8e8c4e..69b17fb 100644
--- a/README_tw.md
+++ b/README_tw.md
@@ -8,8 +8,10 @@ Hexapod v2 using Linkit 7697
 
 可以用任何手機 (iOS 或 Android) 來控制它的動作 (包括前進，後退，扭動等等...)
 
-可參考以下的 Youtube 影片 https://youtu.be/NJ7DdDEcq3U
-<a href='https://youtu.be/NJ7DdDEcq3U'><img width=480 src='http://img.youtube.com/vi/NJ7DdDEcq3U/0.jpg'/></a>
+可參考以下的 Youtube 影片 https://youtu.be/NJ7DdDEcq3U & https://youtu.be/To2Y6Mhu-CE
+
+<a href='https://youtu.be/NJ7DdDEcq3U'><img src='http://img.youtube.com/vi/NJ7DdDEcq3U/mqdefault.jpg'/></a>
+<a href='https://youtu.be/To2Y6Mhu-CE'><img src='http://img.youtube.com/vi/To2Y6Mhu-CE/mqdefault.jpg'/></a>
 
 > 在 https://smallptsai.github.io/hexapod-v2-7697/ 可以看到更多影片
 
diff --git a/mechanism/LEG.md b/mechanism/LEG.md
index c6e12e3..42baff3 100644
--- a/mechanism/LEG.md
+++ b/mechanism/LEG.md
@@ -1,7 +1,7 @@
 # Leg Assemble Instruction
 
 Leg assembly instruction video https://youtu.be/oaAE5fC09KQ is also available.
-<a href='https://youtu.be/oaAE5fC09KQ'><img width=480 src='http://img.youtube.com/vi/oaAE5fC09KQ/0.jpg'/></a>
+<a href='https://youtu.be/oaAE5fC09KQ'><img src='http://img.youtube.com/vi/oaAE5fC09KQ/mqdefault.jpg'/></a>
 
 ## Preparation
 
diff --git a/mechanism/README.md b/mechanism/README.md
index f2ae6d6..6807d43 100644
--- a/mechanism/README.md
+++ b/mechanism/README.md
@@ -13,7 +13,7 @@
 Please check [Leg Assemble](LEG.md) for more detail instructions
 
 Leg assembly instruction video https://youtu.be/oaAE5fC09KQ is also available.
-<a href='https://youtu.be/oaAE5fC09KQ'><img width=480 src='http://img.youtube.com/vi/oaAE5fC09KQ/0.jpg'/></a>
+<a href='https://youtu.be/oaAE5fC09KQ'><img src='http://img.youtube.com/vi/oaAE5fC09KQ/mqdefault.jpg'/></a>
 
 > Note. Total 6 Legs are required.