To view all the videos in order...
You can play as the GP-01Fb and GP02A Gundam (both of which are from Gundam 0083, if my memory doesn't fail me...) It's pretty straightforward, really...
For the GP-01Fb:
Beat the game as any robot in hard mode, and you'll get to play as the GP-01Fb
For the GP01a:
Beat the game as the GP-01Fb in hard mode, and you'll get to play as the GP02A
That's not so bad, is it...? I got this from Bandit's page, btw...