To place your videos on the timeline please, follow the steps below:
Once you are done recording and want to start working on your projects you can reach the section with the list of your projects by:
Access from main screen:
or from the Hamburger Menu:
Select the project you need and tap Edit button:
Overwrite: Audio | Layers | Cameras:
To Edit Camera Options: Tap on the Overwrite option. To place a fragment from a different video tap on the preview window of that video.
To stop adding video on the timeline tap on the Pause Editing button
To change duration of the video fragments:
Select Cut Room.
Hold white vertical line that represents ending of certain fragment and pull it to the left if you want to make the fragment shorter or to the right if you want to make it longer.