feat: Update featured video on v2 home page (#2594)

Author: jlchilders11

templates/homepage.html

@@ -3,6 +3,7 @@
 {% load static %}
 {% load text_helpers avatar_tags %}
 {% load waffle_tags %}
+{% load custom_static %}
 
 {% block content %}
   {# homepage hero #}
@@ -220,10 +221,29 @@ <h3 class="pb-2 mb-4 text-lg md:text-2xl capitalize border-b border-gray-400 tex
         </div>
         <div class="flex flex-col justify-center items-center h-full pb-4">
           <div class="mx-auto">
-            <div class="flex items-center justify-center h-full py-4 rounded-lg">
-              <a href="https://www.youtube.com/watch?v=XB3uEit5R_Y" target="_blank" rel="noopener noreferrer" class="text-sm md:text-lg text-center text-sky-600 dark:text-sky-300 hover:text-orange dark:hover:text-orange">
-                Getting Started with Boost.Asio: Timers and Serial Ports
-              </a>
+            <div class="flex flex-col items-left justify-left h-full py-4 rounded-lg">
+                <h2>Audience Screening at CppCon 2026!</h2>
+                <p>Since 1998, the Boost community has been building the libraries that power
+                some of the world&rsquo;s most ambitious technology&mdash;from planetary rovers to
+                particle accelerators. Now, we&rsquo;re ready to share that story with you.</p>
+                <a href="{% large_static 'img/v2/boost-trailer-thumbnail.png' %}">
+                <img src="{% large_static 'img/v2/boost-trailer-thumbnail.png' %}"
+                    alt="Official poster for the film Boost.Documentary">
+                </a>
+                <figcaption style="align-self: center"><cite>Boost.Documentary</cite> &mdash; official poster</figcaption>
+                <p>We are proud to announce the audience screening of
+                <cite>Boost.Documentary</cite>, an intimate look at the people, challenges,
+                and collaboration behind the code that helps run our world. Join us at
+                <a href="https://cppcon.org/">CppCon 2026</a> in Aurora on September&nbsp;16th
+                to see the film and celebrate the history of Boost.</p>
+                <a href="https://youtu.be/myQRC4f9jTE" target="_blank" rel="noopener noreferrer" class="text-sm md:text-lg text-center text-sky-600 dark:text-sky-300 hover:text-orange dark:hover:text-orange">
+                  The Open-Source Code Running On Mars - Boost Documentary Trailer
+                </a>
+                <p>We&rsquo;d love to see you in Aurora for the screening and the full CppCon
+                experience, so register a ticket for CppCon today!</p>
+                <p class="justify-center flex items-center ">
+                  <a style="flex-basis: fit-content;" class="justify-center flex items-center py-3 px-6 text-base font-medium link-header text-white hover:text-white hover:bg-sky-600 hover:border-white dark:hover:bg-sky-600 rounded-md border md:text-lg border-orange bg-orange dark:bg-charcoal dark:hover:bg-charcoal/75" href="https://cppcon.org/registration/">Register for CppCon&nbsp;2026</a>
+                </p>
             </div>
           </div>
         </div>