How do I extend an AI video and make it longer?

Extending a video you already have

Upload the clip on the generation screen instead of an image. Accepted containers are MP4, WebM, MOV, AVI and MKV, up to 64 MB. Your original file becomes the first segment of the result — it is not re-generated, so nothing about it changes — and the continuation is generated from its last frame.

Because the continuation starts from a real frame of your footage, the join is only as good as the frame you stop on. Ending on a stable frame, with the subject fully in shot and the camera not mid-pan, is the single biggest thing you control.

What an extension costs

Extending costs exactly what generating costs: 4.125 credits per second of new video, rounded up. Adding 20 seconds to an existing clip costs 83 credits. The seconds you already have are never re-billed.

Which plans include it

• Standard, $9/month — extended mode included, 200 credits per month (48 seconds of video).
• Pro, $49/month — extended mode included, 1500 credits per month (6 min 3 s of video).
• 3-day trial — 63 credits on Standard, card required, no charge until the trial ends.

What this means for you

Extend when the shot is right and you want more of it: the last frame carries over, so continuity holds. Start a new generation instead when the scene or the subject changes, because an extension inherits what the previous clip ended on and cannot invent a cut. If you are budgeting, count the whole sequence in seconds rather than in clips, since every extension is charged at the same per-second rate as the first request.