Mp4Split allows it's user to "split" an MP4 file into multiple different segments. Along with splitting the movie up, it can also be used to extract segments of video from a movie file. Mp4Split uses ffmpeg -vcodec copy option to split your movies as quickly as you can copy them with 0 loss to quality.
This app can not work well so I select another free video editor for Mac called MovieMator Free Mac Video Eidtor. It can also split videos easily and fast! If you are a beginner to video eidting, you can try this app.
This product is great for splitting up TV Shows after converting to MP4. If you use MP4DVD or another DVD ripper to media-transfer your DVD's, they sometimes come in as one large MP4 of all the episodes on the DVD. This product will quickly split them up. And if you use MP4DVD to rip the DVD it will create a chapter index file so the chapters show up in Mp4Split.