diff --git a/server/server.js b/server/server.js
index 2da7f94..69b42ef 100644
--- a/server/server.js
+++ b/server/server.js
@@ -707,7 +707,8 @@ function startYoutubeDownload(url) {
     selectedIndex: 0,
     thumbnail: null,
     process: null,
-    error: null
+    error: null,
+    debug: { binary: null, args: null, logs: [] }
   };
 
   youtubeJobs.set(job.id, job);
@@ -717,6 +718,20 @@ function startYoutubeDownload(url) {
   return job;
 }
 
+function appendYoutubeLog(job, line) {
+  if (!job?.debug) return;
+  const lines = Array.isArray(job.debug.logs) ? job.debug.logs : [];
+  const split = String(line || "").split(/\r?\n/);
+  for (const l of split) {
+    if (!l.trim()) continue;
+    lines.push(l.trim());
+  }
+  while (lines.length > 80) {
+    lines.shift();
+  }
+  job.debug.logs = lines;
+}
+
 function launchYoutubeJob(job) {
   const binary = getYtDlpBinary();
   const args = [
@@ -728,6 +743,7 @@ function launchYoutubeJob(job) {
     "--write-info-json",
     job.url
   ];
+  job.debug = { binary, args, logs: [] };
   const child = spawn(binary, args, {
     cwd: job.savePath,
     env: process.env
@@ -736,6 +752,7 @@ function launchYoutubeJob(job) {
 
   const handleChunk = (chunk) => {
     const text = chunk.toString();
+    appendYoutubeLog(job, text);
     for (const raw of text.split(/\r?\n/)) {
       const line = raw.trim();
       if (!line) continue;
@@ -750,7 +767,14 @@ function launchYoutubeJob(job) {
   child.on("error", (err) => {
     job.state = "error";
     job.downloadSpeed = 0;
+    appendYoutubeLog(job, `spawn error: ${err?.message || err}`);
     job.error = err?.message || "yt-dlp çalıştırılamadı";
+    console.error("❌ yt-dlp spawn error:", {
+      jobId: job.id,
+      message: err?.message || err,
+      binary,
+      args
+    });
     broadcastSnapshot();
   });
 }
@@ -829,7 +853,18 @@ async function finalizeYoutubeJob(job, exitCode) {
   job.downloadSpeed = 0;
   if (exitCode !== 0) {
     job.state = "error";
+    const tail = job.debug?.logs ? job.debug.logs.slice(-8) : [];
     job.error = `yt-dlp ${exitCode} kodu ile sonlandı`;
+    if (tail.length) {
+      job.error += ` | ${tail.join(" | ")}`;
+    }
+    console.warn("❌ yt-dlp çıkış kodu hata:", {
+      jobId: job.id,
+      exitCode,
+      binary: job.debug?.binary,
+      args: job.debug?.args,
+      lastLines: tail
+    });
     broadcastSnapshot();
     return;
   }
@@ -845,6 +880,11 @@ async function finalizeYoutubeJob(job, exitCode) {
     if (!videoFile) {
       job.state = "error";
       job.error = "Video dosyası bulunamadı";
+      console.warn("❌ yt-dlp çıktı video bulunamadı:", {
+        jobId: job.id,
+        savePath: job.savePath,
+        lastLines: job.debug?.logs?.slice(-8) || []
+      });
       broadcastSnapshot();
       return;
     }