diff --git a/src/components/image-editor/EditorAgentConversation/MessageBubble.tsx b/src/components/image-editor/EditorAgentConversation/MessageBubble.tsx
index ae52e6afd..e1c35701f 100644
--- a/src/components/image-editor/EditorAgentConversation/MessageBubble.tsx
+++ b/src/components/image-editor/EditorAgentConversation/MessageBubble.tsx
@@ -116,10 +116,10 @@ function ToolCallView({ toolCall }: { toolCall: EditorAgentToolCall }) {
               <ResolvedAssetVideo
                 src={video.videoSrc}
                 objectKey={video.objectKey}
-                fallbackSrc={video.thumbnailSrc}
                 refreshKey={
                   video.resourceId ?? video.objectKey ?? toolCall.toolName
                 }
+                poster={video.thumbnailSrc ?? undefined}
                 controls
                 playsInline
                 preload="metadata"