Non-skippable YouTube ads run 15 to 60 s: how many Sume clips make 60?

The length range

Google Ads Help (read 2026-10-09) lists non-skippable in-stream video ads at 15 to 60 seconds, depending on the campaign subtype, billed on target CPM. A 60-second version is the upper end of that range. The question for an AI-video workflow is whether one model call can make it.

Longest single clip per Sume model

Sume's video docs list each model's supported durations. The longest single clips are 30 seconds for seedance-2.5 and wan-3.0, 15 seconds for seedance-2, minimax-h3 and minimax-h3-max, and 10 seconds for gemini-omni-flash-1.1. A 60-second ad is therefore at least two calls. The table gives the minimum number of clips for 60 seconds and the generation cost at each model's lowest listed tier, using list prices read 2026-10-08.

Joining the clips

Timeline 1.0 places up to 200 video slots on one audio spine and renders them as one MP4, with optional transitions of up to one second. A 60-second render is 1 billed minute, $0.10, so the wan-3.0 route is $3.75 + $0.10 = $3.85 before voiceover and music. Chaining clips from one model leaves a visible seam unless the shots are designed to cut, so plan the story as separate shots rather than one continuous take.

• Clip prices are per output second and linear inside each model's range, per the shared price list.
• Omni Flash 1.1 includes native audio always; Timeline needs an audio spine or a declared silent one, so choose which audio the ad uses.
• Per the Google page, a non-skippable ad's exact allowed length depends on the campaign subtype, so confirm the length for yours before you render.

Not the same as a bumper

The same page lists bumpers at 6 seconds with a 5-second minimum. A 6-second clip is inside every model's range above (the shortest minimum is 2 seconds for wan-3.0, the longest minimum is 5 seconds for the minimax models), so a bumper is one call, not a chain.

Choosing between the routes

The cheapest route on paper is two 30-second wan-3.0 clips, but price is not the only constraint. A 60-second ad has to hold attention with no skip button for the whole length, so the story matters more than the unit price. Plan the cuts first, then decide how many separate clips the script needs: a 60-second ad of eight 7.5-second beats is eight clips whatever the per-model ceiling is.

Billing is linear inside each model's range, so splitting a script into more clips costs the same per second as fewer, longer ones, apart from the shortest-clip floors. The real cost of more clips is review time and consistency between shots, which is why a shared reference image or a fixed prompt prefix is worth the effort.

Finish with a single Timeline render so the audio is one continuous track. The render is rounded up to whole minutes, so a 61-second file is billed as 2 minutes, $0.20; keep the total at or under 60 seconds if you want the one-minute price.