include the demo video on the docs site

Author: Haugen

docs/index.html

@@ -22,6 +22,19 @@ <h1>bcu</h1>
     </header>
 
     <main class="container">
+        <section class="video">
+            <div class="video-container">
+                <iframe 
+                    width="560" 
+                    height="315" 
+                    src="https://www.youtube.com/embed/w9mhCYBUh-I" 
+                    title="bcu Demo" 
+                    frameborder="0" 
+                    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" 
+                    allowfullscreen>
+                </iframe>
+            </div>
+        </section>
         <section class="hero">
             <div class="terminal-demo">
                 <div class="terminal-header">