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! Not a daft question at all! It’s a great one, and the difference is important depending on your use case.

Generated Avatar Video refers to pre-rendered videos created using AI avatars and scripts. You provide an image (or select an avatar), input text or audio, and the system generates a video of the avatar speaking. It’s a static, downloadable video—great for consistent content like training, marketing, or explainer videos.

Check out this guide for more details: Custom Avatars: 

Interactive Avatar Streaming is for real-time interaction with an avatar through a live stream. Think of it like a digital presenter or assistant you can control via text input (or backend prompts) in real time. It’s dynamic and streaming-based—not a file you download.

How to use Interactive Avatars in HeyGen: a comprehensive overview

In your case it sounds like you’re looking for generated avatar videos—since you're working with images/videos and voice, and plan to use them across platforms through an API. That’s the right direction for scalable, repeatable content.

If you can questions related to API, the best way to get an answer to a technical question like this is to post to the Developer Docs discussion here: 

That discussion is monitored by a technical team so they'll be able to help you out over there 😊

sorry if i sound daft, but here's a basic question

What's the difference between “generated avatar video” & “interactive avatar streaming”?

I would like to upload images &/or video of a person talking, along with his/her voice, & implement the whole thing in an API eventually so that I can use it on any of my platforms along with the streaming SDK. In this context, I guess I need the “generated avatar video”, right?

Couple of newbie questions, sorry

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