📌 This feature is only available for Synthesia Starter, Creator and Enterprise Plan Customers.
If you would like to upgrade, use our plan upgrade guide
Start with a new video
Click New video in the top-right corner.
Choose any template, including your custom templates.
Select a Brand Kit, if needed.
Click Create with AI.
Choose your source
Select how you want to provide content:
Prompt — Describe your topic and include any instructions or key points.
Script — Paste your script exactly as you want it spoken. Use paragraph breaks to create scenes.
File — Upload a document (.ppt/.pptx/.pdf/.doc/.docx/.txt).
URL — Paste a public link to repurpose existing content.
Set up your project
Choose an approximate video length.
Add optional details to guide the AI:
Objective
Audience
Language
Speaker
Tone
These fields help the assistant shape the script and structure.
Generate and refine your outline
Click Create Outline.
Review the draft and edit the structure, topics, and flow until it matches your intent.
Build your video
Click Create Video to generate scenes and script.
For any scene you’d like to switch, select Replace layout to choose a different layout from your template.
When ready:
Click Generate Video to create it as-is, or
Click Continue in Editor to fine-tune elements like visuals, avatars, timing, and media.
Once finished, click Generate at the top-right corner.
📚 Want to understand how your data is used? Visit the Synthesia Legal Hub for a full breakdown.
💬 FAQs
What file types can I upload?
What file types can I upload?
You can upload .ppt, .pptx, .pdf, .doc, .docx, or .txt files.
What are the upload limits?
What are the upload limits?
File size: Max 50MB
Script length: Max 30,000 tokens (≈20,000 words)
What are the limits for URLs?
What are the limits for URLs?
Minimum: 60 tokens (≈45 words) or 1 image
Maximum: 30,000 tokens (≈20,000 words)
How are PowerPoint files used?
How are PowerPoint files used?
If your PowerPoint includes speaker notes, those will be used to generate the script.
How long can AI Assist videos be?
How long can AI Assist videos be?
AI Assist videos have a 5-minute limit. For longer videos, you can:
Split the content into multiple videos
Use the Editor, which supports longer durations
Can I keep editing in the AI Assistant after starting?
Can I keep editing in the AI Assistant after starting?
No. Once you enter the Editor or click Generate, the video becomes a regular project.
What's next?
💡 Want to make changes to your script after initial creation? check out our article of editing with AI