Removing out of date video installation tutorials

Author: sstevens2

_includes/install_instructions/editor.html

@@ -33,12 +33,6 @@ <h3>Text Editor</h3>
           for an example on how to open nano.
           It should be pre-installed.
         </p>
-        <h4 id="editor-macos-video-tutorial">Video Tutorial</h4>
-        <div class="yt-wrapper2">
-        <div class="yt-wrapper">
-        <iframe type="text/html" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" src="https://www.youtube-nocookie.com/embed/9LQhwETCdwY?modestbranding=1&playsinline=1&iv_load_policy=3&rel=0" class="yt-frame" allowfullscreen></iframe>
-        </div>
-        </div>
       </article>
       <article role="tabpanel" class="tab-pane" id="editor-linux">
         <p>

_includes/install_instructions/git.html

@@ -53,15 +53,8 @@ <h3>Git</h3>
           (Note: this project is no longer maintained.)
           Because this installer is not signed by the developer, you may have to
           right click (control click) on the .pkg file, click Open, and click
-          Open in the pop-up dialog. You can watch 
-          <a href="https://www.youtube.com/watch?v=9LQhwETCdwY ">a video tutorial about this case</a>.
+          Open in the pop-up dialog.
         </p>
-        <h4>Video Tutorial</h4>
-        <div class="yt-wrapper2">
-        <div class="yt-wrapper">
-          <iframe type="text/html" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" src="https://www.youtube-nocookie.com/embed/9LQhwETCdwY?modestbranding=1&playsinline=1&iv_load_policy=3&rel=0" class="yt-frame" allowfullscreen></iframe>
-        </div>
-        </div>
       </article>
       <article role="tabpanel" class="tab-pane" id="git-linux">
         <p>

_includes/install_instructions/r.html

@@ -28,12 +28,6 @@ <h3>R</h3>
           administrator" instead of double-clicking). Otherwise problems may occur later,
           for example when installing R packages.
         </p>
-        <h4>Video Tutorial</h4>
-        <div class="yt-wrapper2">
-        <div class="yt-wrapper">
-        <iframe type="text/html" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" src="https://www.youtube-nocookie.com/embed/q0PjTAylwoU?modestbranding=1&playsinline=1&iv_load_policy=3&rel=0" class="yt-frame" allowfullscreen></iframe>
-        </div>
-        </div>
       </article>
       <article role="tabpanel" class="tab-pane" id="rstats-macos">
         <p>
@@ -43,12 +37,6 @@ <h4>Video Tutorial</h4>
           Also, please install the
           <a href="https://posit.co/download/rstudio-desktop/">RStudio IDE</a>.
         </p>
-        <h4>Video Tutorial</h4>
-        <div class="yt-wrapper2">
-        <div class="yt-wrapper">
-        <iframe type="text/html" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" src="https://www.youtube-nocookie.com/embed/5-ly3kyxwEg?modestbranding=1&playsinline=1&iv_load_policy=3&rel=0" class="yt-frame" allowfullscreen></iframe>
-        </div>
-        </div>
       </article>
       <article role="tabpanel" class="tab-pane" id="rstats-linux">
         <p>

_includes/install_instructions/shell.html

@@ -97,12 +97,6 @@ <h3>The Bash Shell</h3>
 	  </li>
         </ol>
         <p>This will provide you with both Git and Bash in the Git Bash program.</p>
-        <h4>Video Tutorial</h4>
-        <div class="yt-wrapper2">
-        <div class="yt-wrapper">
-        <iframe type="text/html" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" src="https://www.youtube-nocookie.com/embed/339AEqk9c-8?modestbranding=1&playsinline=1&iv_load_policy=3&rel=0" class="yt-frame" allowfullscreen></iframe>
-        </div>
-        </div>
       </article>
       <article role="tabpanel" class="tab-pane" id="shell-macos">
         <p>
@@ -129,12 +123,6 @@ <h4>Video Tutorial</h4>
           <kbd>Return</kbd> key and reboot.  To check available shells, type
           <code>cat /etc/shells</code>.
         </p>
-        <h4 id="shell-macos-video-tutorial">Video Tutorial</h4>
-        <div class="yt-wrapper2">
-        <div class="yt-wrapper">
-        <iframe type="text/html" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" src="https://www.youtube-nocookie.com/embed/9LQhwETCdwY?modestbranding=1&playsinline=1&iv_load_policy=3&rel=0" class="yt-frame" allowfullscreen></iframe>
-        </div>
-        </div>
       </article>
       <article role="tabpanel" class="tab-pane" id="shell-linux">
         <p>