Good video splitter for MKV? (SOLVED)

Need help with this one. I want to upload my movie to youtube but its too long and in MKV– are there any deecent video splitters that keep the audio synced so I can upload it to youtube?
BTW, trailer for my movie that i want to upload.
http://www.youtube.com/watch?v=jfR9YksGSFE
Answer #1