You can convert videos with 'bink' to the bink-format and exchange them in the following folder strukture:
Grand Prix 4/MenuData/PC/GP2001/Videos
The videos shown in diverse menu backrounds are:
- BG_flag
- BG_Rain - Light
- BG_Tyretread
- Straight3
- wheel_lo_blur (showing in the first menu after starting the game)
The other videos like 'Poleposition', '1st' and so on are self-explaining in which moments they are being played.