Update README.md

Author: MooersLab

README.md

@@ -146,15 +146,15 @@ Type "roundview" on either command line. You should get back this if no molecule
     set_view (1.0,0.0,0.0,0.0,1.0,0.0,0.0,0.0,1.0,0.0,0.0,-50.0,0.0,0.0,0.0,40.0,100.0,-20.0);
    ```
 
-Link to roundview.py installation video for Linux and PyMOLHyridX11 for the mac on YouTube:
+## Link to roundview.py installation video for Linux and PyMOLHyridX11 for the mac on YouTube:
 
 [![IMAGE ALT TEXT HERE](http://img.youtube.com/vi/watch?v=XQWQzq48DeA/0.jpg)](http://www.youtube.com/watch?v=XQWQzq48DeA)
 
-Link to roundview.py installation video for MacPyMOL:
+## Link to roundview.py installation video for MacPyMOL:
 
 [![IMAGE ALT TEXT HERE](http://img.youtube.com/vi/watch?v=XTwwWgwj4z0/0.jpg)](http://www.youtube.com/watch?v=XTwwWgwj4z0)
 
-Link to roundview.py installation video for PyMOL om Windows:
+## Link to roundview.py installation video for PyMOL om Windows:
 
 [![IMAGE ALT TEXT HERE](http://img.youtube.com/vi/watch?v=XTwwWgwj4z0/0.jpg)](http://www.youtube.com/watch?v=Dh2ihD5mIxY)