Okay, so I've tried using VirtualDub to split my movies, but I found out that most of my video files have formats that are not supported by VirtualDub, such as Xvid, MP4, or other file formats. Thus, I can't split. What other programs are good and will allow me to split these files? Thanks.
What are you talking about xvid is supported by virtual dub. for mpeg files try MPEG2Schnitt http://www.doom9.org/Soft21/DigiTV/Mpeg2Schnitt08.zip
XviD is just a video codec. VDub won't split raw XviD, it won't split XviD in mp4, mkv, ogm, nut, dsm, etc. mp4 is not a type of avi, it is a completely different container.
oh sorry i thought it was a avi with xvid codec. as far as mp4 goes try this http://gpac.sourceforge.net/auth_mp4box.php or Quicktime/Pro