diff --git a/10/streams/index.html b/10/streams/index.html
index 8b6786b..e65eae9 100644
--- a/10/streams/index.html
+++ b/10/streams/index.html
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diff --git a/11/streams/index.html b/11/streams/index.html
index 863122b..8df6ea0 100644
--- a/11/streams/index.html
+++ b/11/streams/index.html
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             <div class="video__block">
diff --git a/20/streams/index.html b/20/streams/index.html
index 1513f2b..27cd3e9 100644
--- a/20/streams/index.html
+++ b/20/streams/index.html
@@ -38,10 +38,10 @@
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           <div class="yt__video__block">
             <div class="yt__video__inner__block">
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             <div class="video__block">
diff --git a/21/streams/index.html b/21/streams/index.html
index 1513f2b..27cd3e9 100644
--- a/21/streams/index.html
+++ b/21/streams/index.html
@@ -38,10 +38,10 @@
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             <div class="yt__video__inner__block">
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             <div class="video__block">
diff --git a/22/streams/index.html b/22/streams/index.html
index 1513f2b..27cd3e9 100644
--- a/22/streams/index.html
+++ b/22/streams/index.html
@@ -38,10 +38,10 @@
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             <div class="yt__video__inner__block">
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             <div class="video__block">
diff --git a/23/streams/index.html b/23/streams/index.html
index bd7ce6c..ba9d222 100644
--- a/23/streams/index.html
+++ b/23/streams/index.html
@@ -38,10 +38,10 @@
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             <div class="yt__video__inner__block">
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             <div class="video__block">
diff --git a/24/streams/index.html b/24/streams/index.html
index bd7ce6c..ba9d222 100644
--- a/24/streams/index.html
+++ b/24/streams/index.html
@@ -38,10 +38,10 @@
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           <div class="yt__video__block">
             <div class="yt__video__inner__block">
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+                <iframe  class="yt_series video_2" src="https://www.youtube.com/embed/9ZhsnXM2OVM?rel=0&showinfo=0&end=622" frameborder="0" allowfullscreen></iframe>
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+                <iframe  class="yt_series video_4" src="https://www.youtube.com/embed/Vk55Kl9x_Fw?rel=0&showinfo=0&end=564" frameborder="0" allowfullscreen></iframe>
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             <div class="video__block">
diff --git a/25/streams/index.html b/25/streams/index.html
index 5290519..bf74eff 100644
--- a/25/streams/index.html
+++ b/25/streams/index.html
@@ -38,10 +38,10 @@
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             <div class="yt__video__inner__block">
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+                <iframe  class="yt_series video_2" src="https://www.youtube.com/embed/9ZhsnXM2OVM?rel=0&showinfo=0&end=622" frameborder="0" allowfullscreen></iframe>
+                <iframe  class="yt_series video_3" src="https://www.youtube.com/embed/SYmqwvE8umM?rel=0&showinfo=0end=557" frameborder="0" allowfullscreen></iframe>
+                <iframe  class="yt_series video_4" src="https://www.youtube.com/embed/Vk55Kl9x_Fw?rel=0&showinfo=0&end=564" frameborder="0" allowfullscreen></iframe>
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             </div>
             <div class="video__block">
diff --git a/26/streams/index.html b/26/streams/index.html
index b481597..e85e6cc 100644
--- a/26/streams/index.html
+++ b/26/streams/index.html
@@ -38,10 +38,10 @@
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             <div class="yt__video__inner__block">
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+                <iframe  class="yt_series video_2" src="https://www.youtube.com/embed/9ZhsnXM2OVM?rel=0&showinfo=0&end=622" frameborder="0" allowfullscreen></iframe>
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+                <iframe  class="yt_series video_4" src="https://www.youtube.com/embed/Vk55Kl9x_Fw?rel=0&showinfo=0&end=564" frameborder="0" allowfullscreen></iframe>
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             </div>
             <div class="video__block">
diff --git a/27/streams/index.html b/27/streams/index.html
index b481597..e85e6cc 100644
--- a/27/streams/index.html
+++ b/27/streams/index.html
@@ -38,10 +38,10 @@
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           <div class="yt__video__block">
             <div class="yt__video__inner__block">
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+                <iframe  class="yt_series video_2" src="https://www.youtube.com/embed/9ZhsnXM2OVM?rel=0&showinfo=0&end=622" frameborder="0" allowfullscreen></iframe>
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+                <iframe  class="yt_series video_4" src="https://www.youtube.com/embed/Vk55Kl9x_Fw?rel=0&showinfo=0&end=564" frameborder="0" allowfullscreen></iframe>
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             <div class="video__block">
diff --git a/28/streams/index.html b/28/streams/index.html
index b481597..e85e6cc 100644
--- a/28/streams/index.html
+++ b/28/streams/index.html
@@ -38,10 +38,10 @@
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             <div class="yt__video__inner__block">
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             <div class="video__block">
diff --git a/30/streams/index.html b/30/streams/index.html
index 89ce654..d0d29fa 100644
--- a/30/streams/index.html
+++ b/30/streams/index.html
@@ -38,10 +38,10 @@
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             <div class="yt__video__inner__block">
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             <div class="video__block">
diff --git a/31/streams/index.html b/31/streams/index.html
index 89ce654..d0d29fa 100644
--- a/31/streams/index.html
+++ b/31/streams/index.html
@@ -38,10 +38,10 @@
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-                <iframe  class="yt_series video_3" src="https://www.youtube.com/embed/7JYEEx7SBuE?rel=0&showinfo=0end=557" frameborder="0" allowfullscreen></iframe>
-                <iframe  class="yt_series video_4" src="https://www.youtube.com/embed/3kJgYIkAeHs?rel=0&showinfo=0&end=564" frameborder="0" allowfullscreen></iframe>
+                <iframe  class="yt_series video_1 active" style="display:block" src="https://www.youtube.com/embed/ni3XPsYC5cQ?rel=0&showinfo=0&end=602" frameborder="0" allowfullscreen></iframe>
+                <iframe  class="yt_series video_2" src="https://www.youtube.com/embed/9ZhsnXM2OVM?rel=0&showinfo=0&end=622" frameborder="0" allowfullscreen></iframe>
+                <iframe  class="yt_series video_3" src="https://www.youtube.com/embed/SYmqwvE8umM?rel=0&showinfo=0end=557" frameborder="0" allowfullscreen></iframe>
+                <iframe  class="yt_series video_4" src="https://www.youtube.com/embed/Vk55Kl9x_Fw?rel=0&showinfo=0&end=564" frameborder="0" allowfullscreen></iframe>
              </div>
             </div>
             <div class="video__block">
diff --git a/32/streams/index.html b/32/streams/index.html
index 0c3ce19..2cf175b 100644
--- a/32/streams/index.html
+++ b/32/streams/index.html
@@ -59,28 +59,28 @@
                       class="yt__placeholder video_1"
                       style="display:block"
                       src="/{{version}}/images/intro_to_streams-iframe-placeholder.png" 
-                      onclick="loadVideo('iframe-placeholder-intro', 'Z3JKCLG3VP4?rel=0&showinfo=0&end=602', 'video_1')" />
+                      onclick="loadVideo('iframe-placeholder-intro', 'ni3XPsYC5cQ?rel=0&showinfo=0&end=602', 'video_1')" />
                       <span class="third-party" style="display:block" id="video_1_warn">(Clicking the image will load a video from YouTube)</span>
 
                 <img id="iframe-placeholder-creating"  
                       border="1px"
                       class="yt__placeholder video_2" 
                       src="/{{version}}/images/creating-streams-iframe-placeholder.png" 
-                      onclick="loadVideo('iframe-placeholder-creating', 'LxxeXI1mPKo?rel=0&showinfo=0&end=622', 'video_2')" />
+                      onclick="loadVideo('iframe-placeholder-creating', '9ZhsnXM2OVM?rel=0&showinfo=0&end=622', 'video_2')" />
                       <span class="third-party" id="video_2_warn">(Clicking the image will load a video from YouTube)</span>
 
                 <img id="iframe-placeholder-transforming" 
                       border="1px"
                       class="yt__placeholder video_3" 
                       src="/{{version}}/images/transforming_part_1-iframe-placeholder.png" 
-                      onclick="loadVideo('iframe-placeholder-transforming', '7JYEEx7SBuE?rel=0&showinfo=0end=557', 'video_3')" />
+                      onclick="loadVideo('iframe-placeholder-transforming', 'SYmqwvE8umM?rel=0&showinfo=0end=557', 'video_3')" />
                       <span class="third-party" id="video_3_warn">(Clicking the image will load a video from YouTube)</span>
 
                 <img id="iframe-placeholder-transforming-two"  
                       border="1px"
                       class="yt__placeholder video_4" 
                       src="/{{version}}/images/transforming_part_2-iframe-placeholder.png" 
-                      onclick="loadVideo('iframe-placeholder-transforming-two', '3kJgYIkAeHs?rel=0&showinfo=0&end=564', 'video_4')" /> 
+                      onclick="loadVideo('iframe-placeholder-transforming-two', 'Vk55Kl9x_Fw?rel=0&showinfo=0&end=564', 'video_4')" /> 
                       <span class="third-party" id="video_4_warn">(Clicking the image will load a video from YouTube)</span>         
             </div>
         </div>
diff --git a/33/streams/index.html b/33/streams/index.html
index 5f4ac6a..3a09d2a 100644
--- a/33/streams/index.html
+++ b/33/streams/index.html
@@ -60,28 +60,28 @@
                    class="yt__placeholder video_1"
                    style="display:block"
                    src="/{{version}}/images/intro_to_streams-iframe-placeholder.png"
-                   onclick="loadVideo('iframe-placeholder-intro', 'Z3JKCLG3VP4?rel=0&showinfo=0&end=602', 'video_1')"/>
+                   onclick="loadVideo('iframe-placeholder-intro', 'ni3XPsYC5cQ?rel=0&showinfo=0&end=602', 'video_1')"/>
               <span class="third-party" style="display:block" id="video_1_warn">(Clicking the image will load a video from YouTube)</span>
 
               <img id="iframe-placeholder-creating"
                    border="1px"
                    class="yt__placeholder video_2"
                    src="/{{version}}/images/creating-streams-iframe-placeholder.png"
-                   onclick="loadVideo('iframe-placeholder-creating', 'LxxeXI1mPKo?rel=0&showinfo=0&end=622', 'video_2')"/>
+                   onclick="loadVideo('iframe-placeholder-creating', '9ZhsnXM2OVM?rel=0&showinfo=0&end=622', 'video_2')"/>
               <span class="third-party" id="video_2_warn">(Clicking the image will load a video from YouTube)</span>
 
               <img id="iframe-placeholder-transforming"
                    border="1px"
                    class="yt__placeholder video_3"
                    src="/{{version}}/images/transforming_part_1-iframe-placeholder.png"
-                   onclick="loadVideo('iframe-placeholder-transforming', '7JYEEx7SBuE?rel=0&showinfo=0end=557', 'video_3')"/>
+                   onclick="loadVideo('iframe-placeholder-transforming', 'SYmqwvE8umM?rel=0&showinfo=0end=557', 'video_3')"/>
               <span class="third-party" id="video_3_warn">(Clicking the image will load a video from YouTube)</span>
 
               <img id="iframe-placeholder-transforming-two" 
                    border="1px"
                    class="yt__placeholder video_4"
                    src="/{{version}}/images/transforming_part_2-iframe-placeholder.png"
-                   onclick="loadVideo('iframe-placeholder-transforming-two', '3kJgYIkAeHs?rel=0&showinfo=0&end=564', 'video_4')"/>
+                   onclick="loadVideo('iframe-placeholder-transforming-two', 'Vk55Kl9x_Fw?rel=0&showinfo=0&end=564', 'video_4')"/>
               <span class="third-party" id="video_4_warn">(Clicking the image will load a video from YouTube)</span>
           </div>
       </div>
diff --git a/34/streams/index.html b/34/streams/index.html
index 13c81f1..7fd2d7e 100644
--- a/34/streams/index.html
+++ b/34/streams/index.html
@@ -59,28 +59,28 @@
                    class="yt__placeholder video_1"
                    style="display:block"
                    src="/{{version}}/images/intro_to_streams-iframe-placeholder.png"
-                   onclick="loadVideo('iframe-placeholder-intro', 'Z3JKCLG3VP4?rel=0&showinfo=0&end=602', 'video_1')"/>
+                   onclick="loadVideo('iframe-placeholder-intro', 'ni3XPsYC5cQ?rel=0&showinfo=0&end=602', 'video_1')"/>
               <span class="third-party" style="display:block" id="video_1_warn">(Clicking the image will load a video from YouTube)</span>
 
               <img id="iframe-placeholder-creating"
                    border="1px"
                    class="yt__placeholder video_2"
                    src="/{{version}}/images/creating-streams-iframe-placeholder.png"
-                   onclick="loadVideo('iframe-placeholder-creating', 'LxxeXI1mPKo?rel=0&showinfo=0&end=622', 'video_2')"/>
+                   onclick="loadVideo('iframe-placeholder-creating', '9ZhsnXM2OVM?rel=0&showinfo=0&end=622', 'video_2')"/>
               <span class="third-party" id="video_2_warn">(Clicking the image will load a video from YouTube)</span>
 
               <img id="iframe-placeholder-transforming"
                    border="1px"
                    class="yt__placeholder video_3"
                    src="/{{version}}/images/transforming_part_1-iframe-placeholder.png"
-                   onclick="loadVideo('iframe-placeholder-transforming', '7JYEEx7SBuE?rel=0&showinfo=0end=557', 'video_3')"/>
+                   onclick="loadVideo('iframe-placeholder-transforming', 'SYmqwvE8umM?rel=0&showinfo=0end=557', 'video_3')"/>
               <span class="third-party" id="video_3_warn">(Clicking the image will load a video from YouTube)</span>
 
               <img id="iframe-placeholder-transforming-two" 
                    border="1px"
                    class="yt__placeholder video_4"
                    src="/{{version}}/images/transforming_part_2-iframe-placeholder.png"
-                   onclick="loadVideo('iframe-placeholder-transforming-two', '3kJgYIkAeHs?rel=0&showinfo=0&end=564', 'video_4')"/>
+                   onclick="loadVideo('iframe-placeholder-transforming-two', 'Vk55Kl9x_Fw?rel=0&showinfo=0&end=564', 'video_4')"/>
               <span class="third-party" id="video_4_warn">(Clicking the image will load a video from YouTube)</span>
           </div>
       </div>
diff --git a/intro.html b/intro.html
index c8445e2..e36f244 100644
--- a/intro.html
+++ b/intro.html
@@ -7,7 +7,7 @@
     var iframe = document.createElement('iframe');
     iframe.width="480";
     iframe.height="270";
-    iframe.src="https://www.youtube.com/embed/FKgi3n-FyNU?modestbranding=1";
+    iframe.src="https://www.youtube.com/embed/vHbvbwSEYGo?modestbranding=1";
     iframe.frameborder="0";
     iframe.allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture";
     iframe.setAttribute('allowFullScreen', '');
diff --git a/quickstart.html b/quickstart.html
index ab6e9d0..3f809cd 100644
--- a/quickstart.html
+++ b/quickstart.html
@@ -8,7 +8,7 @@
     iframe.class="youtube-embed page-header-video-embed";
     iframe.width="480";
     iframe.height="270";
-    iframe.src="https://www.youtube.com/embed/FKgi3n-FyNU?modestbranding=1";
+    iframe.src="https://www.youtube.com/embed/vHbvbwSEYGo?modestbranding=1";
     iframe.frameborder="0";
     iframe.allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture";
     iframe.setAttribute('allowFullScreen', '');