diff --git a/packages/backend/src/index.ts b/packages/backend/src/index.ts
index 973a6b5..e7029c1 100644
--- a/packages/backend/src/index.ts
+++ b/packages/backend/src/index.ts
@@ -5,7 +5,7 @@ import fastifyMultipart from "@fastify/multipart";
 import fastifyStatic from "@fastify/static";
 import { createYoga } from "graphql-yoga";
 import { eq } from "drizzle-orm";
-import { files } from "./db/schema/index";
+import { files, videos } from "./db/schema/index";
 import path from "path";
 import { existsSync, mkdirSync } from "fs";
 import { writeFile, rm } from "fs/promises";
@@ -109,6 +109,20 @@ async function main() {
 
     if (!result[0]) return reply.status(404).send({ error: "File not found" });
 
+    // Block unauthenticated access to premium video files
+    if (result[0].mime_type?.startsWith("video/")) {
+      const premiumCheck = await db
+        .select({ premium: videos.premium })
+        .from(videos)
+        .where(eq(videos.movie, id))
+        .limit(1);
+      if (premiumCheck[0]?.premium) {
+        const token = request.cookies["session_token"];
+        const sessionData = token ? await redis.get(`session:${token}`) : null;
+        if (!sessionData) return reply.status(401).send({ error: "Unauthorized" });
+      }
+    }
+
     const { filename, mime_type } = result[0];
     reply.header("Cache-Control", "public, max-age=31536000, immutable");