Splitting video into parts can be done by different methods according to your purpose.
1. The most simple way to split your video is the following. Select the file you want to split by a single mouse click on the timeline. Place the cursor to the point where the first fragment should end and the second should begin. Then click the “Split into parts” button on the Tools section of the Editor tab.
After that you’ll get two video fragments placed on two different lines on the timeline.
2. If you need to split video into parts and apply effects to the whole file, you can use the splitting tool during video export to the resulting format. Add a video file to the scene and select the "Export project" tab on the ribbon command bar.
You will see the form with properties for project export. Click the "Set markers" button and locate markers at the points where you want the file to be split and click "Apply changes…"
Then open the “Additional settings” tab and choose the split method "By markers". You can split video not only by markers but also by size of separate parts of the resulting file.
After all properties are set, click the "Convert files" button to convert your project to one of available formats. The resulting file will be split into parts in accordance with the selected properties.
The advantage of this method is its speed, you don’t need to prepare a project; you only need to select properties according to which splitting will be performed. The disadvantage of the method is the fact that you can’t apply effects to separate parts of the split file because you get separate files only at the end of the export process.
3. If you want to apply effects to separate parts of your video, you can split a file and place each fragment into an individual scene. For this purpose, add a file to the scene and click "Cutting and splitting" in object properties or in object menu.
You will see a familiar window of video editing which allows you to place markers in the positions where you would like to split the file. Finally click the "Apply changes…" button. The program will split the file by markers. After splitting all the parts will be placed inside a sprite.
Now your project contains the necessary number of scenes according to the number of separate parts and you can apply different effects to each part of the file. In order to split the resulting file into parts by separate scenes which contain parts of the original video file, you should deselect "Join scenes to single" when exporting project.
In such case, each scene will be saved in a separate video file.
A certain advantage of this method is its flexibility, because each part of the file can be edited independently from the remaining parts. The disadvantage is its complexity, because you should perform additional actions to prepare such a project.
4. You can also split a video file into parts as per the second method and then edit each part at your discretion: apply effects, remove fragments or perform other editing actions. Then you should export these fragments separately. The disadvantage of this method is a double transcoding of video that may reduce the quality of the resulting video. But if you choose formats without compression, or use lossless compression, you can avoid loss of quality. The advantage of this method is its simplicity and flexibility, each part can be edited independently from other parts.
You can get more information about the program on Free Video Editor' description page.