diff --git a/src/main.ts b/src/main.ts
index 27be3ac..3900dc1 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -2685,11 +2685,26 @@ function downloadVODPart(
                     lastBytes = downloadedBytes;
                     lastTime = now;
 
+                    let etaStr = '';
+                    if (speed > 0 && downloadedBytes > 0) {
+                        const elapsedSec = (Date.now() - downloadStartTime) / 1000;
+                        if (elapsedSec > 3) {
+                            const avgSpeed = downloadedBytes / elapsedSec;
+                            if (expectedDurationSeconds && expectedDurationSeconds > 0) {
+                                const estimatedTotalBytes = avgSpeed * expectedDurationSeconds;
+                                if (estimatedTotalBytes > downloadedBytes) {
+                                    const remainingSec = (estimatedTotalBytes - downloadedBytes) / avgSpeed;
+                                    etaStr = formatETA(remainingSec);
+                                }
+                            }
+                        }
+                    }
+
                     onProgress({
                         id: itemId,
                         progress: -1, // Unknown total
                         speed: formatSpeed(speed),
-                        eta: '',
+                        eta: etaStr,
                         status: `${formatBytes(downloadedBytes)} heruntergeladen`,
                         currentPart: partNum,
                         totalParts: totalParts,