Handle wrapped YouTube SSL errors on Spaces

app.py

@@ -331,8 +331,22 @@ def _build_youtube_transcript_api() -> YouTubeTranscriptApi:
     return YouTubeTranscriptApi(http_client=_build_youtube_http_client())
 
 
+def _looks_like_youtube_ssl_failure(error: Exception) -> bool:
+    error_text = str(error)
+    ssl_markers = (
+        "HTTPSConnectionPool",
+        "SSLError",
+        "UNEXPECTED_EOF_WHILE_READING",
+        "EOF occurred in violation of protocol",
+        "Max retries exceeded with url",
+    )
+    return isinstance(error, (SSLError, RequestException)) or any(
+        marker in error_text for marker in ssl_markers
+    )
+
+
 def _format_youtube_transcript_error(error: Exception) -> str:
-    if isinstance(error, (SSLError, RequestException)):
+    if _looks_like_youtube_ssl_failure(error):
         proxy_hint = (
             " Configure `YOUTUBE_HTTP_PROXY` / `YOUTUBE_HTTPS_PROXY` "
             "or standard `HTTP_PROXY` / `HTTPS_PROXY` in the Space secrets."