Shopify Canvas has no app blocks yet: where the product clip goes

Before you duplicate a theme into Shopify Canvas, check whether your product video is an app block or embed, because Canvas does not support those at launch. A clip that sits in one of those blocks will not come along, and the changelog says rollouts are not supported in Canvas either.

An existing post covers which image and clip sizes to prepare for Canvas. This one is about what the launch does not include.

Shopify's own page frames Canvas as a design surface for building every page of a store in one interactive workspace, with Sidekick taking chat instructions. That is a real change in how a store gets built, and it is also a reason to check the gaps before you commit a live theme to it.

What does Canvas not support at launch?

The October 1, 2026 changelog entry lists the limits: third-party themes from the Shopify Theme Store, Markets, rollouts or translations, app blocks and app embeds, and automatic theme updates for themes edited in Canvas. It adds that you can create a new theme in Canvas or duplicate a Shopify or custom theme there, while existing themes stay in the current editor.

How do I find out if my product video is an app block?

Open the product page in your current theme editor and click the video. If the section is labeled with an app name, or a review or video-gallery app injects it, it is an app block or embed. If the section is part of the theme itself, it is not an app block, and the changelog gives no reason to expect it to be dropped.

Write down every page where this applies before you move anything. Product pages with video galleries and landing pages with embedded players are the usual places.

What does this mean for a Sume clip?

A Sume clip is a plain MP4 at a media.sume.com URL, and what loads it on the page is up to your theme. That means the file is portable even when the player is not: you can keep the same clip and change how it is placed. Make sure the clip suits its slot, such as 9:16 for a tall loop and 16:9 for a hero, and keep a copy of it in your own storage.

The video generation docs list aspect ratios and durations per model, so check GET /v1/videos/models rather than assuming a ratio is available.

Sume's side of this is deliberately small. The job returns a file at a URL, and nothing in the docs ties it to a particular theme, player or app. If you later move a clip from an app block to a native placement, you re-use the same file and change only where it is attached.

Should I wait?

If your store leans on app blocks, yes, for those pages. Canvas lives next to the current editor, so you can try it on a duplicate and leave the live theme alone. Shopify has not published dates for the missing support in the entry I read, so I would not plan around one.

How does this connect to Rollouts?

Shopify announced discounts in Rollouts the day after Canvas, on October 2. The Canvas entry lists rollouts among the things Canvas does not support at launch, so a theme you build in Canvas cannot be staged to a share of traffic through a rollout yet. If you want to compare a new clip or a new offer on a slice of traffic, do it in the current editor.

See the Rollouts discounts post for how to make one clip per offer.