diff --git a/task-launcher/src/tasks/matrix-reasoning/trials/instructions.ts b/task-launcher/src/tasks/matrix-reasoning/trials/instructions.ts
index 1ffba8492..244d70043 100644
--- a/task-launcher/src/tasks/matrix-reasoning/trials/instructions.ts
+++ b/task-launcher/src/tasks/matrix-reasoning/trials/instructions.ts
@@ -31,7 +31,7 @@ export const instructions = instructionData.map((data) => {
 
                  
                         <img
-                            src=${mediaAssets.images[data.image]}
+                            src=${mediaAssets.images[data.image] || mediaAssets.images.imageNotFoundFallback}
                             alt='Instruction graphic'
                         />
                     </div>`;
diff --git a/task-launcher/src/tasks/memory-game/trials/instructions.ts b/task-launcher/src/tasks/memory-game/trials/instructions.ts
index 60db60e5f..b80110d41 100644
--- a/task-launcher/src/tasks/memory-game/trials/instructions.ts
+++ b/task-launcher/src/tasks/memory-game/trials/instructions.ts
@@ -61,12 +61,12 @@ export const instructions = instructionData.map((data) => {
                         </div>
                         <div class="lev-stim-content-x-3">
                             ${
-                              data.video
+                              data.video && mediaAssets.video[data.video]
                                 ? `<video class='instruction-video-small' autoplay loop>
                                     <source src=${mediaAssets.video[data.video]} type='video/mp4'>
                                 </video>`
                                 : `<img
-                                    src=${mediaAssets.images[data.image as string]}
+                                    src=${mediaAssets.images[data.image as string] || mediaAssets.images.imageNotFoundFallback}
                                     alt='Instruction graphic'
                                 />`
                             }
diff --git a/task-launcher/src/tasks/mental-rotation/trials/instructions.ts b/task-launcher/src/tasks/mental-rotation/trials/instructions.ts
index a5bdfed73..3fc5d76f2 100644
--- a/task-launcher/src/tasks/mental-rotation/trials/instructions.ts
+++ b/task-launcher/src/tasks/mental-rotation/trials/instructions.ts
@@ -36,10 +36,14 @@ export const videoInstructionsFit = {
         <button id="${replayButtonHtmlId}" class="replay">
           ${replayButtonSvg}
         </button>
-        <video class="instruction-video" autoplay>
-          <source src=${mediaAssets.video.mentalRotationExampleFit} type="video/mp4"/>
-          Your browser does not support the video tag.
-        </video>
+        ${
+          mediaAssets.video.mentalRotationExampleFit ? 
+          `<video class="instruction-video" autoplay>
+            <source src=${mediaAssets.video.mentalRotationExampleFit} type="video/mp4"/>
+            Your browser does not support the video tag.
+          </video>` :
+          `<img src=${mediaAssets.images.imageNotFoundFallback} class="instruction-video" />`
+        }
       </div>
     `;
   },
@@ -81,10 +85,14 @@ export const videoInstructionsMisfit = {
         <button id="${replayButtonHtmlId}" class="replay">
           ${replayButtonSvg}
         </button>
-        <video class="instruction-video" autoplay>
-          <source src=${mediaAssets.video.mentalRotationExampleMisfit} type="video/mp4"/>
-          Your browser does not support the video tag.
-        </video>
+        ${
+          mediaAssets.video.mentalRotationExampleMisfit ? 
+          `<video class="instruction-video" autoplay>
+            <source src=${mediaAssets.video.mentalRotationExampleMisfit} type="video/mp4"/>
+            Your browser does not support the video tag.
+          </video>` :
+          `<img src=${mediaAssets.images.imageNotFoundFallback} class="instruction-video" />`
+        }
       </div>
     `;
   },
@@ -123,7 +131,7 @@ export const imageInstructions = {
         <button id="${replayButtonHtmlId}" class="replay">
           ${replayButtonSvg}
         </button>
-        <img src=${mediaAssets.images.mentalRotationExample} class="instruction-video" />
+        <img src=${mediaAssets.images.mentalRotationExample || mediaAssets.images.imageNotFoundFallback} class="instruction-video" />
       </div>
     `;
   },