Hi Gulfstreamaviator,
Altitude - yes
Ias - I am not sure but it is the actual Ias of the aircraft and I have remembered we also get a download of the aircraft groundspeed so I guess it comes from the ADC. when it is not available we get a computer generated ground speed from radar returns.
SFL - All correct!
Rate/climb descent - I think so, it is an instantaneous readout of the rate when the mode "S" transponder was interegated.
As for video I think that the bandwidth is available because there are alot of partameters that could be downloaded that we don't
