These are the steps to split your Snapchat video after you cropped it.
1. Create your Snapchat video and then select your video to crop at least 4 seconds.
2. Click on scissors icon to reveal Drag up to Split Snap.
3. Drag your finger up to reveal Split Snap and release.
4. Now you have split your cropped Snapchat video. You can click the X to delete the original cropped video.