Why write up something that is not a fault. Look in the FCOM at the table where it details when NBPT is available. I assume your company is new to get the 330 or both yourself and the other pilot are new on type. Surprisingly this is not detailed in our FCOM3 but it is standard practice where I work to let the cabin crew know not to start the video until we start our taxi otherwise they will have to do a manual brief to the pax.