diff --git a/www/conservancy/templates/supporter/index.html b/www/conservancy/templates/supporter/index.html
index c6f3b557187239cf740cd57c5680ba3b8ffb5624..50d21093c5856aae48df1f3a0ade90259eed00ae 100644
--- a/www/conservancy/templates/supporter/index.html
+++ b/www/conservancy/templates/supporter/index.html
@@ -81,7 +81,7 @@
 <div class="picture right">
   <img alt="" src="/img/member-project-logos.png">
   <p>Conservancy is currently home to <a href="/projects/current/">almost fifty member projects</a>.</p>
-  <video controls="" poster="/img/2018-11_Molly-de-Blanc-match-announcement-poster.png">
+  <video controls="" poster="/img/2018-11_Molly-de-Blanc-match-announcement-poster.png" style="width: 100%;">
     <source src="/videos/2018-11_Molly-de-Blanc-match-announcement.webm">
 
     <p><a href="/videos/2018-11_Molly-de-Blanc-match-announcement.webm">Download this video</a>