Moved import yt_dlp.

Moved `import yt_dlp` in `__main__.py`.

yt_dlp/__main__.py

@@ -6,13 +6,13 @@
 import sys
 from pathlib import Path
 
-import yt_dlp
-
 if __package__ is None and not getattr(sys, 'frozen', False):
     # direct call of __main__.py
     path = Path(__file__).resolve()
     sys.path.insert(0, str(path.parent.parent))
 
+import yt_dlp
+
 if __name__ == '__main__':
 
     yt_dlp.main()