Following are the steps for creating a video:

1. In the LumenRT scene, click the Movie Editor button , to open the Movie Editor Time-line.
   
2. Add a movie clip to the scene by clicking the Add a movie clip button . This will create a new clip Time-line and capture the existing camera position as the first keyframe.
   
3. Add three additional keyframes by doing the following three times - move the camera to a new position and point of view in the scene, click the Add Keyframe button in the empty keyframe slot.
   
4. The animation is now complete. You can replay the animation by hitting the Play button on the animation Time-line.
   
5. You can change the time interval between keyframes by clicking the keyframe time edit box and entering a new value. Set all the keyframe times in 10 seconds as shown below:
   
6. You can create a new intermediate keyframe between any two frames by doing the following: Click on the existing keyframe on the Time-line editor. Move the Time-line slider to a time that is between two keyframes. When the Add Keyframe button appears, click it to add an intermediate keyframe.
   
7. To hold the camera for a given time at any keyframe, hover the mouse over the lower right corner of the keyframe until the pause clock appears. Click the clock and enter a desired value in seconds.
   
8. To add an audio sound track to the movie clip, return to the movie editor tab and select the Add Audio button on the right side of the interface. This will prompt you to enter an audio file. After the audio file is selected, you can adjust audio properties such as volume boost, fade-in, and fade-out.