Allow youtube_dl/__main__.py to be called directly

diff --git a/youtube_dl/__main__.py b/youtube_dl/__main__.py
index ccc782bec162084147bfebbcbb8eb6bee86c191a..0910e9d1576f261154827a64d828f80a83617418 100755 (executable)
--- a/youtube_dl/__main__.py
+++ b/youtube_dl/__main__.py
@@ -1,6 +1,14 @@
 #!/usr/bin/env python
 
-# Execute with python -m youtube_dl
+# Execute with
+# $ python youtube_dl/__main__.py (2.6+)
+# $ python -m youtube_dl          (2.7+)
+
+import sys
+
+if __package__ is None:
+    import os.path
+    sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 
 import youtube_dl