Extending and Joining Your Videos

One generation gives you a clip of up to 15 seconds. When you need more (a longer establishing shot, a cutscene, a trailer) you extend the clip: a new clip continues from a frame you choose. In this guide we'll extend a video and join the results.

When to extend

• The clip is good but ends too soon.
• You want a longer, continuous shot without a visible cut.
• You want the action to continue in a new direction from a particular moment.

Step 1: Start from a clip you like

Extending continues the motion and look of the clip, so start from one that's already clean. If the base clip drifts or warps, fix that first; extending carries problems forward.

Step 2: Open the video editor

In the video generator, click Edit on the clip. The video editor opens with a preview and a timeline.

Step 3: Pick the frame and describe what happens next

Move the playhead to the frame the new clip should start from, often the last one. In Extend Prompt, describe how the motion continues: "the camera keeps drifting right", "she lowers the sword and turns away". Set the Aspect and Length, and generate. Extending costs the same 15 credits per second as a new clip.

Step 4: Check the join

Play across the point where the extension starts. A good extension is invisible; if you can see a jump, generate the extension again or ask for gentler motion. Slow, steady motion extends more cleanly than fast action.

Step 5: Join and export

Line the clips up on the timeline and export them as one MP4. Exporting is free. Repeat extend and join to build a longer shot a step at a time, and watch the whole thing after each step so small drifts don't add up.

Lengthening versus looping

• Lengthening: extend to make a longer one-way shot, for trailers and cutscenes.
• Looping: for a background behind a menu, ask for motion that returns close to its starting frame, then loop it in your game.