diff --git a/apps/admin-ui/src/app/streams/page.tsx b/apps/admin-ui/src/app/streams/page.tsx
index 78afead..a908b30 100644
--- a/apps/admin-ui/src/app/streams/page.tsx
+++ b/apps/admin-ui/src/app/streams/page.tsx
@@ -85,7 +85,7 @@ export default function StreamsPage() {
         <div className="card" style={{ marginBottom: "1rem" }}>
           <p className="muted" style={{ margin: 0 }}>
             Eén rij per kijker + titel. Alleen echte streams (&gt;512 KB). Stopt iemand → verdwijnt
-            binnen ~3 minuten. Voortgang is een schatting op range-positie.
+            binnen ~3 minuten. Voortgang ≈ gestreamde bytes / bestandsgrootte.
           </p>
         </div>
 
diff --git a/apps/master-api/src/admin/routes.ts b/apps/master-api/src/admin/routes.ts
index 2c9ec92..f1ee1c1 100644
--- a/apps/master-api/src/admin/routes.ts
+++ b/apps/master-api/src/admin/routes.ts
@@ -298,9 +298,10 @@ export async function registerAdminRoutes(app: FastifyInstance, config: Config)
         .sort((a, b) => b.lastActivity.getTime() - a.lastActivity.getTime())
         .map((s) => {
         const fileSize = Number(s.fileSizeBytes || s.mediaFile.sizeBytes || 0);
-        const offset = Number(s.lastByteOffset || 0);
+        const sent = Number(s.bytesSent || 0);
+        // bytesSent loopt netjes op; lastByteOffset springt vaak naar EOF door player Range-probes.
         const progressPercent =
-          fileSize > 0 ? Math.min(100, Math.max(0, (offset / fileSize) * 100)) : null;
+          fileSize > 0 ? Math.min(100, Math.max(0, (sent / fileSize) * 100)) : null;
         const title =
           s.mediaFile.movie?.title ??
           (s.mediaFile.episode