[Hellfighter]

ok here the deal
your desktop set to 1280x1024 when the play back runs it 1024x768 center it to desktop area, so normal there be blacking area outside the video play back

have to set the video player using (nameless?) full screen! so there be no black or blank area outside video play back
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game wise
if i recall right in name? .cfg file in the game folder should be able to reset screen size for the game to play by, manually type it in
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monitor normal
some monitor are limited to what they can handle vs video cards/ chip may be greater then the monitor can handle same other wise to

i use
my game play set to 1152 x 864 720p wide screen set to, but my is set to box, not full screen
my desktop 1280 x 960 1080p wide screen set to
my monitor can max at 1600 x 900 1080p (46inch screen)

check see if the game is set to wide screen! and not box or window

***i really just think it the video player you are using not set to full screen, if its not set to full screen it will center the video when it plays back for you and you don't see it full screen is all