You can make your scenes as long or short as you want, as long as the whole video does not exceed the maximum length of 10 minutes. Duration for captions can also be controlled separately from the scene.
To change the duration of your scene or caption, simply follow steps below:
Click on the element on the Timeline.
If you want to control scene duration, click on the background.
For captions, select the text on the Timeline.
Click and drag the white bar on the right side of the scene to the right to lengthen the duration. For Captions, the bar is light blue. Click and drag it to the left to shorten it.
Now you can hold the rabbit on the scene for as long as you want!
Pro-tip: If the original scene is shorter than the duration you choose, the scene will loop. Keep that in mind!