by Ken Task.
In Virtualbox has the virtual Ubuntu been configured for an IP address? (assuming it has to as your install of Red5 probably used Ubuntu repos to do so). It might be set for DHCP, BTW. One could turn that to a free static IP - probably best. Install the requirements for Moodle - apache, mysql, PHP, etc. then one should be able to access the Moodle via IP at least.
That's IF am understanding the question correctly!
'spirit of sharing', Ken