## Lecture Videos (Preview)

> [!NOTE]
> This release adds new capabilities for Lecture Videos, which remain
under active development and are not yet officially supported in Groups.
APIs, features, and UI/UX may change before final release.
> 
> Lecture Video mode is currently visible only to institutional admins
when creating an assistant.

### New Features
* Lecture Video assistants can now show Mermaid and SVG diagrams and
narrate a short natural description instead of reading the diagram code
aloud.

### Updates & Improvements
* Existing Lecture Video conversations use the latest assistant
formatting guidance for new responses, so updates to LaTeX, diagrams,
`say` snippets, and follow-up behavior apply without recreating the
conversation.

### Resolved Issues
* Fixed: Spoken lecture-video responses may stop early when generated
audio arrives with a brief gap between chunks.