Marks on AI video and festival disclosure rules

Google Flow marks every output with an invisible SynthID watermark. Sora downloads carry a visible moving watermark and C2PA metadata. SceneMixer adds a badge and metadata unless on a paid plan; Higgsfield, LTX Studio and Runway list clean files on paid plans. The Midjourney pages read say nothing on marks. From 8 source pages, read 2026-09-25; no maker pays to be listed.

Inclusion rule. All 7 tools on the filmmaking-tools register. Order. Alphabetical by tool name.

A mark and a disclosure do different work. Thirteen of the 25 festivals here ask, or keep the right to ask, about the AI an entrant used; a watermark or a line of metadata is left by the tool whether or not anyone asks.

An invisible mark is read by software rather than by an audience, so it does nothing at a screening; a visible one does, and a crop can take it out of frame.

Clean files on paid plans are the commonest arrangement on the list, which means one tool can produce marked and unmarked copies of the same film depending on the plan it was made on.

1The rule it answers to

Inclusion rule. All 25 festivals and awards on this site. Order. Alphabetical by festival name.

Every festival's reading, with the organiser's words: Saying which tools were used at every festival.

2In the makers' words

Google Flow

All outputs generated in Google Flow using Veo, Omni, or Nano Banana include invisible SynthID watermarks.

Google Flow Help, Get started with Google Flow

• Will my generations contain a watermark?
  Every output carries an invisible SynthID watermark; a visible one can be switched onGoogle Flow Help, Get started with Google Flow / recorded 2026-09-25

Google Flow on all four points

Higgsfield

Paid plans include watermark-free downloads.

Higgsfield Help Center, who owns my generations

• A practical consideration
  Watermarks on some plans are embedded at generation; paid plans download without themHiggsfield Help Center, who owns my generations / recorded 2026-09-25

Higgsfield on all four points

LTX Studio

No watermarking

LTX Studio pricing page

• Studio plans
  No watermarking on paid Studio plansfeaturesLTX Studio pricing page / recorded 2026-09-25

LTX Studio on all four points

Midjourney

• Pages read; not stated
  None in the rules read (2026-09-25)Midjourney documentation, Video / recorded 2026-09-25

Midjourney on all four points

Runway

No watermarks

Runway pricing page

• Paid plans
  Paid plans list no watermarksfeaturesRunway pricing page / recorded 2026-09-25

Runway on all four points

SceneMixer

Without a paid plan you always get them

SceneMixer guide, what comes out

a small badge is burned into the picture in the corner, and a line of AI-generated-content metadata is written into the file

SceneMixer guide, what you get to keep

• The label
  A corner badge and AI-generated-content metadata; always there without a paid plan, off by default on oneSceneMixer guide, what comes out / recorded 2026-09-25
• The label
  The badge is burned into the picture and the metadata is written into the fileSceneMixer guide, what you get to keep / recorded 2026-09-25

SceneMixer on all four points

Sora

Visible moving watermark on videos downloaded from sora.com or the Sora app

OpenAI, Sora 2 system card

• Provenance
  A visible moving watermark on videos from sora.com or the Sora app, and C2PA metadata on all assetsOpenAI, Sora 2 system card / recorded 2026-09-25

Sora on all four points

3The other questions

• Who owns an AI film: tools' terms beside entry rules
• Longest AI clip against festival running times
• Joining AI clips into a festival-length film

4Pages read

• Google Flow Help, Get started with Google Flow, read 2026-09-25
• Higgsfield Help Center, who owns my generations, read 2026-09-25
• LTX Studio pricing page, read 2026-09-25
• Midjourney documentation, Video, read 2026-09-25
• Runway pricing page, read 2026-09-25
• SceneMixer guide, what comes out, read 2026-09-25
• SceneMixer guide, what you get to keep, read 2026-09-25
• OpenAI, Sora 2 system card, read 2026-09-25