Digital humans range from scripted video presenters to animated 3D characters and conversational assistants. For product demos, explainers, and training, an AI video avatar is often the most practical starting point: prepare the message, choose a presenter, and combine their delivery with the visuals your audience needs. Here is how the technology works and how to create a digital human video in TapVid, from an avatar or a video template.
01
How Do Digital Humans Work?
Digital human technology combines a visual representation with a way to drive its movement. Speech and conversation are separate layers. A character can look human without using generative AI, and a talking avatar can follow a fixed script without understanding the viewer.
- Computer graphics and 3D rendering: Artists or creation tools build a body, face, skin, hair, and clothing. A rig is a set of controls that moves the character. Rendering turns that scene into images. Epic Games’ MetaHuman documentation describes a framework for creating and animating rigged digital humans.
- Generative AI: Some video systems generate moving frames from a portrait, a performance reference, or other inputs. This can reduce the need to model a character by hand. It does not mean the result includes an editable 3D body.
- Speech synthesis: Text-to-speech converts a script into an audio performance. Other workflows use recorded speech. Choosing a synthetic voice and cloning a particular person’s voice are different operations.
- Facial animation and lip sync: A system drives mouth shapes and facial motion from audio or a captured performance. Correct words, plausible mouth movement, and the right expression are separate things to check.
- Interactive AI: A conversational system may add speech recognition, a language model, a knowledge source, and response controls. NVIDIA’s digital human overview describes these as distinct parts of an interactive stack, not properties of every avatar video.
For a prerecorded presenter video, the useful chain is script → speech → animated presenter → finished clip. For a live assistant, the chain must also accept a question, decide what to say, and return an appropriate answer fast enough for a conversation. Real-time graphics alone do not provide that ability.
02
Digital Human Types—and How They Differ from AI Avatars
Choose a digital human by the output you need. The three common workflows below can overlap: an interactive assistant may use a 3D character, while a video presenter may be generated from a photo.
| Workflow | Best fit | What to expect |
|---|---|---|
| AI video avatar | Explainers, product demos, training | A presenter delivers a prepared script in a finished video. |
| 3D digital human | Games, visual effects, simulations | A rigged character can be animated and rendered from different views. |
| Interactive digital human | Live support, guided services, conversational practice | A character connects to a response system that handles new questions. |
Digital human describes a human representation. AI avatar describes a representation created, animated, or controlled with AI; it can also be stylized or non-human. A human-looking AI presenter is both. These terms describe overlapping ideas, not fixed technical standards.
A digital twin has a different purpose: it models a particular real-world entity or system. NIST’s definition covers more than human likenesses. An avatar that resembles someone does not inherit their knowledge, judgment, or memories.
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Where Digital Human Videos Work Best
Video avatars work best when the message can be written and approved in advance. Give the presenter a clear role, then use relevant visuals to make the explanation concrete.
- Product demos: Introduce the task, show the real interface, and explain each action. Pair a presenter with current screen recordings in a product demo video.
- Explainer and marketing videos: Use a presenter to connect the problem, solution, and next step. A SaaS explainer video should show how the product works, while a launch video can focus on one new benefit.
- Employee training: Turn approved onboarding, policy, or process material into short lessons with a consistent presenter. Explore internal enablement videos for team training.
- Education: Introduce a concept, narrate a worked example, and give learners a task to try. Captions, diagrams, and opportunities to ask questions remain essential.
Live customer service belongs to the interactive workflow: it needs a knowledge source, response controls, and a handoff to staff. A finished presenter video delivers a set message; it does not answer new questions.
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How to Create a Digital Human Video in TapVid
Use TapVid AI Avatar when you want to choose the presenter first. You can select a public avatar or create one from an authorized photo, then build the video around your message.
Create a video with an AI avatar
- 1
Prepare your materials
Write a clear brief: who the video is for, what they should learn, and what to do next. Bring an approved script and any screenshots, slides, or product footage needed to explain it. For a custom avatar, use a clear photo you are authorized to use. JPG/JPEG, PNG, and WebP files up to 10 MB are supported.
- 2
Choose or create your presenter
Open Avatars to browse public presenters, or choose New Avatar or Create from a photo. For a custom avatar, upload your photo, confirm the required consent, and follow the photo check. Review the preview, name the avatar, and save it.
- 3
Add the presenter and your content
Choose Create video to carry the avatar into the composer. Describe the audience and purpose, add your source material, and check the language and voice. Keep the script focused on one useful outcome rather than listing every feature.
- 4
Generate and review
Continue through the creation workflow and review any script or storyboard approval steps. Watch the finished video with sound. Check pronunciation, facial movement, captions, and whether the visuals match the narration. Revise unclear passages before sharing.
- 5
Export the finished video
Once the video is ready, open Export and choose from the options available to your account. Review the exported file at the size and on the device your audience will use.
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Start with a Video Template
A template is a useful starting point when you want a ready-made video structure. Instead of planning every scene from scratch, choose a template that supports an avatar and adapt it to your topic.
Create from a template
- 1
Choose a template
Open the TapVid template library and browse the video templates. Choose an avatar-based format that suits your message, such as a product introduction or a short explainer.
- 2
Make it your own
Add your content, choose a presenter, and replace the supporting materials with your own. Keep the narration and visuals focused on the same idea.
- 3
Generate and review
Generate the video, watch it with sound, and check the wording, pacing, and scene transitions before exporting.
Example: A Friendly First Look. This 32-second video combines a seated digital presenter with a product interface segment. The presenter introduces the message; the screen content gives viewers something concrete to follow. It shows how an avatar can become part of a complete video rather than carry the explanation alone.
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Digital Human Example: From Script to Presenter Video
For a simpler example, this clip pairs TapVid’s public avatar Leo with an English script. It demonstrates the core building block: a presenter delivering your prepared message.
Exact script: “This is a digital human video, created from a public avatar and a written script. For a product demo, show the real interface while the presenter explains the next step. Review the words, voice, and mouth movement before you publish.”
The result is a 15.04-second portrait video. For a product demo or lesson, combine this kind of presenter segment with the interface, diagram, or example being explained. Write the narration around what viewers need to see, and leave room for those supporting visuals.
07
Benefits and Limitations of Digital Humans
AI video avatars can reduce repeated filming, give a series a consistent presenter, and make script changes easier to produce. They are particularly useful for recurring lessons, product updates, and explanations that need the same visual identity across several videos.
The work shifts toward preparation and review. You still need an accurate script, useful visuals, and someone responsible for the final message. A revised sentence may require a new render, and the presenter’s gestures or timing can change between clips.
- Visual quality: Review mouth shapes, teeth, blinking, facial edges, and gestures at normal playback speed. A convincing still frame does not guarantee convincing motion.
- Voice quality: Check pronunciation, accent, pacing, and tone with your actual script. A photo provides appearance, not a matching voice.
- Trust and consent: Obtain appropriate permission for a real person’s likeness, voice, and identity. Make synthetic presentation clear when viewers might mistake it for a real recorded statement. Never fabricate a customer testimonial.
- Audience fit: Test training content with the people who will use it. Provide captions or a transcript and check comprehension. Use a real presenter when personal testimony, sensitive communication, or nuanced emotion is central.
Choose the format for the job: TapVid’s avatar workflow creates presenter videos. Live conversation and editable 3D characters require different systems. For a clear explainer, the strongest result usually combines a focused script, a suitable presenter, and visuals that demonstrate the point.
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Frequently Asked Questions
These answers address the main choices involved in using a digital human for video.
What is the difference between a digital human and an AI avatar?
A digital human represents a human’s appearance or behavior. An AI avatar uses AI for creation, animation, or control and may be human-looking or stylized. A human-like AI video presenter can be both. Neither name guarantees live conversation.
Can I create a digital human from a photo?
Yes, with a product that supports photo-based avatars. In TapVid, use an authorized photo to create and preview a custom avatar. A photo does not automatically provide a matching voice, an editable 3D character, or a live assistant.
Do I need 3D modeling skills?
Not for a hosted video-avatar workflow where you choose a presenter and supply a script. A custom character for games, virtual production, or a 3D simulation is a different job and may need rigging, animation, and rendering skills.
Are digital humans the same as AI-generated videos?
No. AI-generated videos can show products, scenery, diagrams, or other subjects without a human representation. A digital human may also be built with conventional computer graphics and animated by a performer rather than generated from a prompt.
Does uploading a photo also clone the person’s voice?
No. Appearance and voice are separate inputs. Choose an appropriate voice for the video, and obtain separate permission if you use a real person’s voice. A portrait alone cannot reproduce how that person speaks.
How can I check whether a digital presenter looks natural?
Review a short sample with the actual script, language, and face you intend to use. Listen for pronunciation and pacing, watch mouth movement and expressions, and ask intended viewers to assess clarity. One successful sample cannot predict every future render.
