diff --git a/apps/web/__tests__/unit/toolbar-reactions.test.ts b/apps/web/__tests__/unit/toolbar-reactions.test.ts
new file mode 100644
index 00000000000..c76ca2ba6f3
--- /dev/null
+++ b/apps/web/__tests__/unit/toolbar-reactions.test.ts
@@ -0,0 +1,83 @@
+import { describe, expect, it, vi } from "vitest";
+import {
+	handleEmojiReaction,
+	REACTIONS,
+} from "@/app/s/[videoId]/_components/toolbar-reactions";
+
+describe("toolbar reactions", () => {
+	it("exposes the standard reaction set in display order", () => {
+		expect(REACTIONS).toEqual([
+			{ emoji: "😂", label: "joy" },
+			{ emoji: "😍", label: "love" },
+			{ emoji: "😮", label: "wow" },
+			{ emoji: "🙌", label: "yay" },
+			{ emoji: "👍", label: "up" },
+			{ emoji: "👎", label: "down" },
+		]);
+	});
+
+	it("prompts sign-in overlay when unauthenticated viewer reacts", () => {
+		const onRequireAuth = vi.fn();
+		const onReact = vi.fn();
+
+		handleEmojiReaction({
+			emoji: "😂",
+			canReact: true,
+			user: null,
+			onRequireAuth,
+			onReact,
+		});
+
+		expect(onRequireAuth).toHaveBeenCalledOnce();
+		expect(onReact).not.toHaveBeenCalled();
+	});
+
+	it("prompts sign-in overlay when user is undefined", () => {
+		const onRequireAuth = vi.fn();
+		const onReact = vi.fn();
+
+		handleEmojiReaction({
+			emoji: "👍",
+			canReact: true,
+			user: undefined,
+			onRequireAuth,
+			onReact,
+		});
+
+		expect(onRequireAuth).toHaveBeenCalledOnce();
+		expect(onReact).not.toHaveBeenCalled();
+	});
+
+	it("suppresses interaction when reactions are disabled", () => {
+		const onRequireAuth = vi.fn();
+		const onReact = vi.fn();
+
+		handleEmojiReaction({
+			emoji: "😍",
+			canReact: false,
+			user: null,
+			onRequireAuth,
+			onReact,
+		});
+
+		expect(onRequireAuth).not.toHaveBeenCalled();
+		expect(onReact).not.toHaveBeenCalled();
+	});
+
+	it("submits reaction when viewer is signed in", () => {
+		const onRequireAuth = vi.fn();
+		const onReact = vi.fn();
+
+		handleEmojiReaction({
+			emoji: "🙌",
+			canReact: true,
+			user: { id: "user-123" },
+			onRequireAuth,
+			onReact,
+		});
+
+		expect(onRequireAuth).not.toHaveBeenCalled();
+		expect(onReact).toHaveBeenCalledOnce();
+		expect(onReact).toHaveBeenCalledWith("🙌", { id: "user-123" });
+	});
+});
diff --git a/apps/web/app/s/[videoId]/_components/Toolbar.tsx b/apps/web/app/s/[videoId]/_components/Toolbar.tsx
index 84a9ddb5c16..64420f05d49 100644
--- a/apps/web/app/s/[videoId]/_components/Toolbar.tsx
+++ b/apps/web/app/s/[videoId]/_components/Toolbar.tsx
@@ -13,6 +13,7 @@ import type { VideoData } from "../types";
 import { AuthOverlay } from "./AuthOverlayLazy";
 import { RecordActionButtons } from "./media-comment/record-actions";
 import type { RecordIntentKind } from "./timeline/TimelineComposer";
+import { handleEmojiReaction, REACTIONS } from "./toolbar-reactions";
 
 // Capture and upload code stays out of the page bundle until someone records.
 const RecorderSurface = dynamic(
@@ -84,50 +85,59 @@ export const Toolbar = ({
 		setRecordIntent({ kind, t });
 	};
 
-	const handleEmojiClick = async (emoji: string) => {
-		if (!canReact || !user) return;
-		const videoElement = document.querySelector("video") as HTMLVideoElement;
-		const currentTime = data.isScreenshot
-			? null
-			: videoElement?.currentTime || 0;
-		const optimisticComment: CommentType = {
-			id: `temp-${Date.now()}` as Comment.CommentId,
-			authorId: user.id,
-			authorName: user.name,
-			authorImage: user.imageUrl,
-			content: emoji,
-			createdAt: new Date(),
-			videoId: data.id,
-			parentCommentId: "" as Comment.CommentId,
-			type: "emoji",
-			timestamp: currentTime,
-			updatedAt: new Date(),
-			mediaKey: null,
-			mediaDuration: null,
-			mediaMeta: null,
-			sending: true,
-		};
+	const handleEmojiClick = (emoji: string) => {
+		handleEmojiReaction({
+			emoji,
+			canReact,
+			user,
+			onRequireAuth: () => setShowAuthOverlay(true),
+			onReact: async (chosenEmoji, authedUser) => {
+				const videoElement = document.querySelector(
+					"video",
+				) as HTMLVideoElement;
+				const currentTime = data.isScreenshot
+					? null
+					: videoElement?.currentTime || 0;
+				const optimisticComment: CommentType = {
+					id: `temp-${Date.now()}` as Comment.CommentId,
+					authorId: authedUser.id,
+					authorName: authedUser.name,
+					authorImage: authedUser.imageUrl,
+					content: chosenEmoji,
+					createdAt: new Date(),
+					videoId: data.id,
+					parentCommentId: "" as Comment.CommentId,
+					type: "emoji",
+					timestamp: currentTime,
+					updatedAt: new Date(),
+					mediaKey: null,
+					mediaDuration: null,
+					mediaMeta: null,
+					sending: true,
+				};
 
-		onOptimisticComment?.(optimisticComment);
+				onOptimisticComment?.(optimisticComment);
 
-		try {
-			const newCommentData = await newComment({
-				content: emoji,
-				videoId: data.id,
-				authorImage: user.imageUrl,
-				parentCommentId: "" as Comment.CommentId,
-				type: "emoji",
-				timestamp: currentTime,
-			});
-			startTransition(() => {
-				onCommentSuccess?.(newCommentData);
-			});
-		} catch (error) {
-			console.error("Error posting comment:", error);
-		} finally {
-			setCommentBoxOpen(false);
-			setComment("");
-		}
+				try {
+					const newCommentData = await newComment({
+						content: chosenEmoji,
+						videoId: data.id,
+						authorImage: authedUser.imageUrl,
+						parentCommentId: "" as Comment.CommentId,
+						type: "emoji",
+						timestamp: currentTime,
+					});
+					startTransition(() => {
+						onCommentSuccess?.(newCommentData);
+					});
+				} catch (error) {
+					console.error("Error posting comment:", error);
+				} finally {
+					setCommentBoxOpen(false);
+					setComment("");
+				}
+			},
+		});
 	};
 
 	const handleCommentSubmit = async () => {
@@ -377,30 +387,3 @@ export const Toolbar = ({
 		</>
 	);
 };
-
-const REACTIONS = [
-	{
-		emoji: "😂",
-		label: "joy",
-	},
-	{
-		emoji: "😍",
-		label: "love",
-	},
-	{
-		emoji: "😮",
-		label: "wow",
-	},
-	{
-		emoji: "🙌",
-		label: "yay",
-	},
-	{
-		emoji: "👍",
-		label: "up",
-	},
-	{
-		emoji: "👎",
-		label: "down",
-	},
-];
diff --git a/apps/web/app/s/[videoId]/_components/toolbar-reactions.ts b/apps/web/app/s/[videoId]/_components/toolbar-reactions.ts
new file mode 100644
index 00000000000..99a1ff3791b
--- /dev/null
+++ b/apps/web/app/s/[videoId]/_components/toolbar-reactions.ts
@@ -0,0 +1,54 @@
+export interface ReactionDefinition {
+	emoji: string;
+	label: string;
+}
+
+export const REACTIONS: readonly ReactionDefinition[] = [
+	{
+		emoji: "😂",
+		label: "joy",
+	},
+	{
+		emoji: "😍",
+		label: "love",
+	},
+	{
+		emoji: "😮",
+		label: "wow",
+	},
+	{
+		emoji: "🙌",
+		label: "yay",
+	},
+	{
+		emoji: "👍",
+		label: "up",
+	},
+	{
+		emoji: "👎",
+		label: "down",
+	},
+];
+
+export interface HandleEmojiReactionParams<TUser> {
+	emoji: string;
+	canReact: boolean;
+	user: TUser | null | undefined;
+	onRequireAuth: () => void;
+	onReact: (emoji: string, user: TUser) => void | Promise<void>;
+}
+
+export function handleEmojiReaction<TUser>({
+	emoji,
+	canReact,
+	user,
+	onRequireAuth,
+	onReact,
+}: HandleEmojiReactionParams<TUser>): void {
+	if (!canReact) return;
+	if (!user) {
+		onRequireAuth();
+		return;
+	}
+	void onReact(emoji, user);
+}