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Guides Synthesia published may 25, 2026
In this guide, you will learn how to turn a written case study into a 1-2 minute video complete with an AI narrator, b-roll, and animations.
You will create a one to two-minute case study video from a written case study file. The finished video can include AI avatar scenes, b-roll or background scenes the avatar narrates over, and animated project-flow scenes with narration.
The best version of this workflow is not one generic case study video. It is a repeatable case study engine for specific audiences.
For an agency, that could mean one approved case study plus several client background memos. Each memo changes the opening, relevance, and CTA while the original proof stays the same.
For content, the same source file can become a YouTube explainer, a Facebook ad, a Reels cutdown, or a short sales page embed. After generation, change the video dimensions for the channel you care about. Use a vertical format when you want the same case study video to work for Reels, TikTok, or Shorts.
Start with the clean case study. Add the audience. Generate the first draft. Then edit the version for the channel where it will actually be used.
For client-specific versions, keep the main case study proof the same and regenerate only the intro, outro, and CTA around each prospect.
You need a written case study. Save it as a `.txt`, `.pdf`, or `.pptx` file.
Good sections to include:
The most useful case studies have clear before-and-after metrics: higher conversion, faster response time, lower cost, more qualified leads, hours saved, or revenue gained.
If you want a client-specific version, make a second file with the prospect's background:
Pro tip: Here's a hack to save tokens and edit time while still making client-specific videos. Each time you want a custom case study video, you can keep the main video the same and simply generate new intros and outros that are client-specific.
Open Synthesia: https://www.synthesia.io in Google Chrome. On the home screen, click Start with Assistant.
Start with Assistant is the fastest path for turning a written case study into a video. You give Synthesia the source file, audience, and objective, then it creates the first outline and script.
Pro tip: If your case study is already a slide deck, you can also use Import PowerPoint. That is useful when the deck already has the structure you want, but Start with Assistant is better when you want Synthesia to create the video arc from a memo or written case study.
Choose a 1- or 2-minute video for the first draft. Then attach the case study file.
For a generic case study video, use a prompt like this:
Turn this case study into a 1-2 minute video for [AUDIENCE].
The topic is [TOPIC].
The objective is [OBJECTIVE].
Preserve the facts, metrics, and quote exactly.For a more targeted sales video, upload the client background file too. Then tell Synthesia how to use both files.
Here is the version we used for the prospect-specific test:
Read the case study and turn it into a 1.5-minute presentation.
Read the client background that I have also attached and mention what parts of the case study are most relevant to this client.
Make the video custom to them.
The audience is [PROSPECT], a prospective client.
The topic is [CASE_STUDY_CLIENT].
The objective is to show [PROSPECT] the best information from the case study so they will want to become our client.Keep the prompt direct. The case study file gives Synthesia the facts, and the prompt tells it what kind of video to make.
After the prompt is in place, select a visual style and click Create Video.
Pro tip: You can generate the case study file and client background file specifically for a client. For example, write one file with the approved case study facts, then write a second file with the prospect's business model, pain points, and the CTA you want the video to use.
After you submit the prompt, Synthesia will read the attachments and respond with a draft direction. Check that it understood the audience, the topic, and the objective before you create the video.
Synthesia will generate a video outline with several short scenes and scripts.
If a slide in the outline looks blank, that does not always mean something is missing. It can mean Synthesia is going to generate an animation or process visual for that scene instead of using an AI avatar.
This is the most important review point. Script generation does not spend your final video generation pass. Review the outline before rendering so you can catch a weak scene or CTA early.
Read each scene before you generate. Check:
The client background should shape the opening, examples, and CTA. The case study should still supply the proof.
Once the outline and scripts look right, click Generate. The video can take several minutes to render. In our run, the finished videos appeared in My recents, where we could open them, play them, share them, or click Edit.
The generated video will mix togther these scene types:
You can open a recently generated video and click Edit. You can change the scene structure, edit the script, adjust visuals, and regenerate the video.
You can also swap the presenter if the video should feel more personal. Synthesia supports personal and custom avatars, so a consulting agency could use the founder, strategist, or account lead as the AI avatar.
If a scene needs stronger visuals, generate alternate b-roll, backgrounds, or images inside Synthesia. The built-in media tools include options such as Google Veo for short video clips and Nano Banana Pro for image generation.
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