What Runway's files carry, read against the entry rules
Runway's own festival asks for 3 to 15 minutes that include generative video, drawn from tools similar to its models. Its pages describe what a finished file can hold: generations of 2 to 10 seconds, Stitch Videos joining clips into one file of up to an hour, and clean downloads on the paid plans. From 6 source pages, read 2026-09-25; no maker pays to be listed.
1What this register already keeps
Six readings of the contest the maker runs, among them the one line its rules leave unstated, then four readings of its own pages — the four a finished file is read for here: length, joining, marks and ownership.
- Submission criteriaThe film must include generative video
- How to enterGenerated video should come from tools similar to Runway's own models
- Submission criteria3 to 15 minutes
- RepresentationsEntrants warrant they own the rights and can grant Runway rights to use the film
- Page headerScreenings in New York on June 11, Los Angeles on June 18 and Tokyo on July 30, 2026
- Rules read; not statedNone in the rules read (2026-09-25)
- Your ContentRunway's terms say it does not claim ownership of your content, which they define to include outputs
- SettingsGen-4.5 clips of 2 to 10 seconds
- IntroductionStitch Videos joins clips into one file, up to 60 minutes in all
- Paid plansPaid plans list no watermarksfeatures
2The contest a tool runs for its own users
Runway's own festival reads like a brief for a finished file: the film must include generative video, and that video should come from tools similar to Runway's own models. Running time is 3 to 15 minutes. Entrants warrant they hold the rights and can grant Runway rights to use the film, and the winners were screened in New York, Los Angeles and Tokyo on three dates in the summer of 2026.
The one thing its rules do not say is how the tools used are to be named. The register writes that silence down as a reading of its own, the same way it treats a blank on any other festival page: an unstated item is a question to settle with the organiser, not an absence to be filled by assumption.
3What its pages say a finished file holds
The tool's own pages fill in the other half. Gen-4.5 generations run 2 to 10 seconds; Stitch Videos joins clips into a single file of up to 60 minutes; paid plans list no watermarks; and the terms say the company does not claim ownership of your content, which they define to include outputs.
Read together, the two lists describe an assembled file rather than one take. A festival-length film is not generated; it is cut from many short generations and stitched, which is exactly the step the register's running-time rows cannot see from the outside. A file that arrives at 9 minutes may hold fifty generations, and the rules read here ask nothing about that count.
4Where the register's other rules meet such a file
Other organisers in the register ask a file to be described rather than measured. The World AI Film Festival in Cannes wants a production file explaining the AI tools used; the Bochnia festival wants a complete tool list and a making-of diary with the entry; the Reply festival has entrants explain how AI was used at all. A stitched file satisfies those asks the same way any other entry does — on paper, separately from the picture.
That is the distinction this column exists to keep straight. A watermark is a property of the file; a disclosure is a property of the entry. The register records which festivals ask for the second, and no export setting supplies it.
5What the counted material keeps beside the tool
The collection put one figure against Runway: 1.4% of the posts it read in a single subreddit name the family, and since nothing was recorded for its post total, that cell is left as not carried rather than filled in by estimate. The two quotations kept beside it are about plans — whether signing up feels like being taken for a ride, and whether a discounted annual plan is worth it — which is the community's own version of reading the pages first.
SceneMixer's row in the table below is a reading of the same kind of page, quoted with its date: aspect ratio is fixed per project, which is the moment a festival's running-time and format rules are easiest to answer.
6What each maker says about its own files
| Maker | What it is built around | Finishing it lists | Audio it lists | What happens to unused plan credits | Pages read |
|---|---|---|---|---|---|
| Runway | Its Gen-4.5 model plus other video and image models, an agentic creative collaborator and editing | 4K upscaling; HDR, ProRes and image sequences on Max | Music, voice and sound-effect generation; custom voice clones from Pro | Standard and Pro monthly credits don't roll over; Max rolls over up to one month; purchased credits never expire | 2026-10-13 |
| SceneMixer | “16:9 landscape (SceneMixer's default) and 9:16 vertical (the usual short-drama frame), chosen per project.” | Not carried on the pages read | Not carried on the pages read | Not carried on the pages read | 2026-10-13 |
Inclusion rule. Rows are the makers this page is about, each read on its own public pages, plus the drama pipeline whose readings this register keeps. A line a maker's page does not carry is written here as not carried on the pages read, which describes the reading rather than the product. Order. Alphabetical by maker name.
| Asked of each reading | Runway | Sora | SceneMixer |
|---|---|---|---|
| One generation runs | 2 to 10 seconds on Gen-4.5 | Up to 20 seconds on sora-2 and sora-2-pro | 15 or 30 seconds per segment, chosen per episode |
| Joining clips | Stitch Videos makes one file of up to 60 minutes | A finished video extends into a new, stitched result | Compositing joins an episode's segments into one file |
| Marks on the file | Paid plans list no watermarks | A visible moving watermark in the app, C2PA metadata on all assets | A corner badge burned into the picture, metadata written into the file |
| Who owns the output | The terms say the company claims no ownership of your content | The user owns the output, as far as the law allows | The user owns the generated results as far as the law allows |
Inclusion rule. Answers read from each maker's own pages as this register recorded them — the vendor pages on 2026-10-13, the register rows on 2026-09-25. A line the pages do not carry is written here as not carried on the pages read, which describes the reading rather than the product. Order. As the lines are listed above.
7What the collection put numbers against
One share figure below, for the family this page is about, then the two short lines kept beside it. Neither measures a file.
| Model family | Share of posts | Posts counted |
|---|---|---|
| Runway | 1.4% | Not carried on the pages read |
Inclusion rule. Model families the collection put a share against, counted from the posts it read. Order. Descending by share.
Does signing up for Runway feel like getting ripped off?
r/runwayml, collected 2026-10-14
Is the Runway Unlimited annual plan at 50% off worth it?
r/runwayml, collected 2026-10-14
8When the other maker's pages fit better
- The film is cut from many generations — Stitch Videos joins clips into one file of up to 60 minutes, which suits a short film assembled from dozens of takes.
- The finish is decided at delivery — 4K upscaling, HDR, ProRes and image sequences are listed on the higher plans, which suits a file destined for a screening rather than a feed.
- A clean file is what is wanted — Paid plans list no watermarks, so the marks a festival might ask about have to come from the entry form instead.
The search behind this page is a question the collection kept as written: "What happens when your AI film makes a festival shortlist?" Beside it: what a film keeps when the maker closes and a contest that checks the generations on its own platform.