I was trying to track down initialBufferTime & expandedBufferTime within the OSMF documentation but I can't seem to locate it. It appears that these values are used within the Flash Media Playback player. Do these parameters exist within the OSMF framework somewhere or is it just custom code?
This is inside the Strobe Media Playback implementation.
Here is the user guide, just in case you need it: www.osmf.org/downloads/pdf/using_fmp_smp_1.5.pdf