The confusion is due to an error in the ASDocs.
netStatus event
Event object type: flash.events.NetStatusEvent
Line #28 in VideoLoader.as is currently:
[Event(name="netStatus", type="flash.events.NetStatusEvent")]
and it should be:
[Event(name="netStatus",type="com.greensock.events.LoaderEvent"]
It is just using the same string as NetStatusEvent.NET_STATUS, but it is actually a LoaderEvent that is dispatched.
Hope that helps.