Its going to need to be saved into your MyDocuments/Command & Conquer 3 Tiberium Wars/Replays folder.
And to comment on the replay, Was a good watch to see good econ growth but on the other hand it seemed a bit one side. Worth watching for a learning experience. Also, I tried watching through pilbots eyes with that camera view, almost made my eyes pop.
My lightning spikes could have been better