Avidemux is video editing .. It can be used to split or merge any video format …

You can download from here :

http://downloads.sourceforge.net/avidemux/avidemux_2.4.1_win32.exe

included can splitting flv files

After you know about merge flv files with avidemux ..

Of course you want to know how to split the flv files …

For example you have a video cd …

It’s format is dat or mpeg …

You must convert the video to flv first using SUPER …

After that you split it with Avidemux ..

Here is the way …

1. Just open Avidemux

2. Open flv files with File->Open and select any flv files

3. Under format in the selection just move the slider

4. Choose Edit->Set Marker A [ to start the editing frame

5. Under format in the selection just move the slider

6. Choose Edit->Set Marker B [ to end the editing frame

7. Choose Edit->Cut to remove the frame (Just make antoher Copy, Paste) to make more understand using flv editing …

8 . Choose File->Save->Save Video and just rename it split.flv to save your work ..

The split flv has been done and you can upload it ..

Here is another link which i think important for flv files …

Download youtube Way

and play the flv files in the windows