I found a lost bunch of Front Mission Earliest version in this trailer. Their bunches inside this trailer has been unused in Final version of this game. It means the in-development/protoype version.
This trailer: https://www.youtube.com/watch?v=2HGszTQAKtM
Compare him to the Earliest VS Final Version.
Also the trailer incudes Driscoll concept art in here. It must be Lloyd Clive in trailer (it matches to the F.H. Translation) not Royd Clive.