diff --git a/README.md b/README.md
index ecb7ca3..b9e9916 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ volume + one CSV plane-list → one `.mp4`, one frame per plane, in list order.
 
 **Live demo & interactive walkthrough:** <https://ofeq-dev.github.io/plane-projection/>
 
-![Projection frame from the lecturer's example CSV](docs/images/example-run/lecturer-row1.png)
+![Croissant projection frame](docs/images/example-run/croissant-row1.png)
 
 ## The problem
 
diff --git a/site/index.html b/site/index.html
index 6ee2ba7..35d95b9 100644
--- a/site/index.html
+++ b/site/index.html
@@ -45,8 +45,8 @@ <h1>Plane projections of 3D voxel volumes, from NRRD to MP4</h1>
       </div>
     </div>
     <figure>
-      <video src="videos/lecturer_example.mp4" autoplay muted loop playsinline controls></video>
-      <figcaption class="hero-meta"><b>lecturer_example.mp4</b> · two valid projections, then two invalid-plane error frames</figcaption>
+      <video src="videos/onion.mp4" autoplay muted loop playsinline controls></video>
+      <figcaption class="hero-meta"><b>onion.mp4</b> · 120 frames of a uint8 onion volume</figcaption>
     </figure>
   </section>