Final Fix: Bypass DNS check for Hugging Face proxies

server.py

@@ -343,22 +343,25 @@ def download_video(youtube_url: str, max_retries: int = 3) -> Path:
     for attempt in range(1, max_retries + 1):
         print(f"[>>] Download attempt {attempt}/{max_retries} ...", flush=True)
 
-        # Quick DNS pre-check so we get a clear error instead of yt-dlp's wall of text
-        try:
-            socket.setdefaulttimeout(10)
-            # Try IPv4 specifically first if it fails
-            socket.getaddrinfo("www.youtube.com", 443, socket.AF_INET)
-        except socket.gaierror as dns_err:
-            last_err = (
-                f"DNS resolution failed for www.youtube.com: {dns_err}. "
-                "Hugging Face core spaces often block YouTube downloads. "
-                "FIX: (1) Use a GPU Space or (2) Add a proxy via YTDLP_PROXY env var."
-            )
-            print(f"[!] {last_err}", flush=True)
-            if attempt < max_retries:
-                time.sleep(2 ** attempt)  # exponential backoff: 2, 4, 8 s
-                continue
-            raise RuntimeError(last_err)
+        # Quick DNS pre-check so we get a clear error instead of yt-dlp's wall of text.
+        # SKIP this check if a proxy is defined, as the proxy handles its own resolution.
+        if not YTDLP_PROXY:
+            try:
+                socket.setdefaulttimeout(10)
+                socket.getaddrinfo("www.youtube.com", 443, socket.AF_INET)
+            except socket.gaierror as dns_err:
+                last_err = (
+                    f"DNS resolution failed for www.youtube.com: {dns_err}. "
+                    "Hugging Face core spaces often block YouTube downloads. "
+                    "FIX: (1) Use a GPU Space or (2) Add a proxy via YTDLP_PROXY env var."
+                )
+                print(f"[!] {last_err}", flush=True)
+                if attempt < max_retries:
+                    time.sleep(2 ** attempt)  # exponential backoff: 2, 4, 8 s
+                    continue
+                raise RuntimeError(last_err)
+        else:
+            print(f"[>>] Skipping DNS pre-check because YTDLP_PROXY is set.", flush=True)
 
         result = subprocess.run(cmd, capture_output=True)