In this help doc

You can check your video before you export it, without using credits. This doc shows how to play a scene in the editor, open the full-screen preview, and make a preview video with real lip-sync for one scene.

To hear the script and see the timing, click Play (▶) in the bar above the scene list. The avatar's voice plays with the scene's text, images, and effects.

Note: The first time you play a script, the voice is generated first. This takes a moment.

To watch the scene in a larger window, click Full-screen preview (⛶) next to Play. The preview plays with the voice and animations. Click Close preview (✕) to go back to the editor.

Note: In this quick preview, the avatar doesn't move or lip-sync. The avatar moves in the exported video.

To see the avatar speak with real lip-sync before you export:

Note: Making a preview video can take a few minutes. Photo avatars appear without motion in the preview video.

Why isn't my avatar moving in the preview?
The quick preview shows the avatar as a still image. To see it move, click Make preview video for the current scene, or export the video.

Does previewing use credits?
No. Playing the scene, the full-screen preview, and Make preview video don't use credits. Credits are used when you export.

Can I make a preview video of my whole project?
No. Make preview video renders only the current scene. To check the whole video, export it.