Entering a film made with Sora
Sora's own pages answer all four points entry rules turn on. Ownership: user owns the output. Longest clip: up to 20 seconds. Joining clips: one clip extended. Marks: visible watermark and C2PA metadata. From 4 source pages, read 2026-09-25; no maker pays to be listed.
| Tool | Longest clip |
|---|---|
| Google Flow | Up to 10 seconds |
| Higgsfield | Up to 60 seconds |
| LTX Studio | Up to 20 seconds |
| Midjourney | Up to 21 seconds |
| Runway | Up to 10 seconds |
| SceneMixer | Up to 30 seconds |
| Sora | Up to 20 seconds |
Inclusion rule. All 7 tools on the filmmaking-tools register. Order. Alphabetical by tool name.
- Ownership
- User owns the output
- Longest clip
- Up to 20 seconds
- Joining clips
- One clip extended
- Marks
- Visible watermark and C2PA metadata
1What its pages say
Sora is OpenAI's video model and app. The API guide gives generations of up to 20 seconds on sora-2 and sora-2-pro, and lets a finished video be extended into a new, stitched result. OpenAI's terms say the user owns the output, with OpenAI assigning its own rights in it, as far as the law allows. For downloads from sora.com and the app, its Sora 2 system card lists a moving watermark in the picture, and it lists C2PA metadata for every asset.
2Why it is on the list
The entry rules of the African AI Film Festival name it.
List the main AI tools and models (Runway, Sora, Midjourney, ElevenLabs, etc.) and briefly describe how AI was used.
African AI Film Festival, home page
- AI ethics and disclosureEvery entry lists the main AI tools and models and how AI was used
Who owns what comes out: User owns the output
you (a) retain your ownership rights in Input and (b) own the Output.
OpenAI Terms of Use
- Ownership of contentOpenAI's terms say the user owns the output and assign OpenAI's rights in it, as far as the law allows
Six festivals here make entrants warrant they hold every right in the film and five let them keep copyright while granting a licence.
Who owns what comes out, every tool beside the rules
Longest clip in one generation: Up to 20 seconds
Generate videos up to 20 seconds when you need longer beats, fuller scenes, or fuller spots.
OpenAI API, video generation guide
- DurationUp to 20 seconds on sora-2 and sora-2-pro
Six festivals here want three minutes or more; three minutes alone takes at least nine clips at Sora's longest length.
Longest clip in one generation, every tool beside the rules
Joining clips into a film: One clip extended
Video extensions let you continue an existing completed video and create a new stitched result.
OpenAI API, video generation guide
- Extend completed videosA finished video can be extended into a new, stitched result
Running-time rules apply to the finished film, so the clips have to be put together somewhere.
Joining clips into a film, every tool beside the rules
Marks on the file: Visible watermark and C2PA metadata
Visible moving watermark on videos downloaded from sora.com or the Sora app
OpenAI, Sora 2 system card
- ProvenanceA visible moving watermark on videos from sora.com or the Sora app, and C2PA metadata on all assets
Thirteen of the 25 festivals here ask, or keep the right to ask, about the AI an entrant used; the marks are what the tool leaves in the file either way.
Marks on the file, every tool beside the rules
3Other tools on the list
A dated reading of the maker's own pages, not advice; the festival's current rules and the maker's current terms govern. All tools.
4Pages read
- OpenAI Terms of Use, read 2026-09-25
- OpenAI API, video generation guide, read 2026-09-25
- OpenAI, Sora 2 system card, read 2026-09-25