I'm sorry, but I don't quite understand what you're asking here. When you export video from MixEmergency it will create a new QuickTime Movie file. This is the only file you need to copy and then upload to Facebook. The other two files (a file with the extension ".MixEmergencyPerformance", and an audio file with either ".wav" or ".m4a" as an extension) do not need to be copied and uploaded - though you will want to keep these files around if you ever plan on exporting your mix again.