This video demonstrates cPanel's Application Manager interface. You can use this interface to register and deploy your own custom applications with the Phusion Passenger® application server.
Related Documentation:
Application Manager - https://documentation.cpanel.net/display/82Docs/Application+Manager
How to Install a Python WSGI Application - https://documentation.cpanel.net/display/CKB/How+to+Install+a+Python+WSGI+Application