videoplayer.c contains sample code demonstrating how one could
write a javascript plugin that interacts with a native videoplayer.

triggerreceiver.c contains an example that shows how to extend the
OBJECT element. this example forms the basis for Opera's ATVEF
triggerreceiver implementation.

the corresponding html files contain html to test the plugins (but you
probably had that figured out already).

type make to compile and link the plugins.
