AI Avatar News Posting System - An automated system for creating TikTok news videos with an AI avatar

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Process description

This automation is a complete system for automatically creating news videos with an AI avatar based on current Google trends. The system analyzes trending topics in Russia, selects a news topic with a duplicate check, creates a detailed scenario using AI, generates videos with a realistic avatar through HeyGen, creates attractive headlines and automatically publishes ready-made videos on TikTok.

API keys and services:

1. SerPapi - to get Google trends
2. OpenAI API Key - for AI content generation (gpt-4.1-mini)
3. HeyGen API - to create videos with an AI avatar
4. Blotato API - for posting on social media
5. Google Sheets OAuth2 - to take into account topics and avoid duplicates
6. TikTok Account ID - for automatic publishing

System architecture by blocks

SECTION 1: TOPIC SELECTION AND PREPARATION

1.1 When clicking 'Execute workflow' - Manual launch

Purpose: Initiates the process of creating a news video

Startup alternatives:

• Manual Trigger for testing
• Schedule Trigger for regular content creation
• Webhook for external integrations

1.2 Get trends — Google Trends analysis

Purpose: Gets current trends in Russia via SerPapi

HTTP Request settings:

• URL: https://serpapi.com/search?engine=google_trends_trending_now
• Authentication: SerPapi
• Body Parameters:
  
  • engine: google_trends_trending_now
  • geo: RU

What we get:

{

“trending_searches”: [

{

“query”: “Policy News”,

“traffic”: "+500% “,

“description”: “Current political developments”

},

{

“query”: “Technology News”,

“traffic”: "+300% “,

“description”: “Recent IT developments”

},

{

“query”: “Economic events”,

“traffic”: "+250% “,

“description”: “Important economic news”

}

]

}

1.3 Topic Generation — AI News Topic Selection

Purpose: Intelligent selection of the right news topic from trends

Connected components:

• OpenAI Chat Model (gpt-4.1-mini)
• Simple Memory - memory for avoiding repetitions
• Rows - Google Sheets verification tool

System prompt:

You're an AI agent who should generate me a topic for a viral video.

Describe the topic briefly in Russian - two three words, no comments.

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Before choosing a theme, be sure to use the Rows tool to get the themes you've used before and don't repeat them again!

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Choose only some news topics, your answer should be at least two words long!

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And here are the current trending topics from which you should choose one at random:

[list of 10 trending topics]

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Work algorithm:

1. Gets a list of 10 trending topics
2. Turns to Google Sheets to check topics that have already been used
3. Selects a random news topic that has not been used
4. Returns the short topic title (2-3 words)

Examples of generated topics:

• “Economic News”
• “Technologies of the Future”
• “Political events”
• “Sporting Achievements”

1.4 Rows — Duplicate Checker Tool

Purpose: Allows AI to check previously used topics

The structure of the accounting table:

Topic

Status

Result

Economic news

Done

https://heygen.com/video/abc123

Future technologies

In progress

-

SECTION 2: CONTENT CREATION

2.1 Append or update row in sheet - Topic entry

Purpose: Captures the selected topic in a table with the “In progress” status

Settings:

• Operation: AppendorUpdate
• Matching Columns: Topic
• Columns Mapping:
  
  • Topic: {{$json.output}} (selected topic)
  • Status: “In progress”

2.2 Script — Creating a detailed scenario

Purpose: Generates a complete script for a 40-second news video

Connected components:

• OpenAI Chat Model1 (gpt-4.1-mini)
• Simple Memory1 - dialogue memory
• SerPapi - search for more information

Detailed prompt:

INSTRUCTIONS: Create a ready-made script for a video with an AI avatar based on a given topic.

Only display the script text that the avatar will pronounce in the first person.

Use your SerPapi tool to find more details on this topic online.

Script requirements:

- Duration: 40 seconds

- Speech style: conversational, natural, as if the avatar speaks directly to the viewer

- Structure: an introduction with a hook, the main part with logical transitions, a conclusion with a call to action

- Use short sentences for easy listening

- Include ellipse pauses (...) where you need a natural pause in speech

- Add emotional accents where appropriate

- The text should sound natural when voiced

Topic: {{$json ['Topic']}}

Output format:

Start right away with the script text. No introductory words like “Here's the script:” or “Video script:”.

The first sentence should be the beginning of the avatar's speech.

‍The process of creating a script:

1. AI gets a topic (e.g. “Economic News”)
2. Uses SerpAPI to find relevant information
3. Analyzes found materials
4. Creates a structured 40-second scenario
5. Optimizes text for natural voiceovers

Example scenario:

Hi! Today I want to talk about important economic events...

The Central Bank made an unexpected decision on the key rate. This will seriously affect loans and deposits...

Experts predict a 2-3 percent increase in inflation. This will especially affect food and real estate...

What does this mean for ordinary people? Loans will become more expensive, but deposits will bring more income...

Subscribe to stay up to date with all important economic news!

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2.3 Captions - Generating titles

Purpose: Creates attractive titles for TikTok based on a script

Connected components:

• OpenAI Chat Model2 (gpt-4.1-mini)
• Simple Memory2 - separate memory for titles

Prompt for headlines:

Come up with a short title based on this scenario: {{$json.output}}

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SECTION 3: CREATING AND PUBLISHING A VIDEO

3.1 Generate Video1 — Create videos with AI avatar

Purpose: Generates videos with a realistic AI avatar through the HeyGen API

‍HeyGen API settings:

• Method: POST
• URL: https://api.heygen.com/v2/video/generate
• Authentication: HeyGen (credentials)
• Headers: accept: application/json

JSON Body configuration:

{

“video_inputs”: [

{

“character”: {

“type”: “avatar”,

“avatar_id”: “e9804d068a4b419ea0271a46e4ea4d34",

“avatar_style”: “normal”

},

“voice”: {

“type”: “text”,

“input_text”: “{{$ ('Script') .item.json.output}}”,

“voice_id”: “Your voice ID”,

“speed”: 1.1

}

}

],

“dimension”: {

“width”: 1280,

“height”: 720

}

}

‍Video parameters:

• Avatar ID: your avatar id
• Voice ID: your voice ID
• Speed: 1.1 (slightly accelerated speech for dynamism)
• Resolution: 1280x720 (HD quality for TikTok)

3.2 Get Video1 → If → Wait — Readiness Waiting Cycle

Purpose: Checks the video generation status and waits for completion

Get Video1 settings:

• URL: https://api.heygen.com/v1/video_status.get
• Query Parameter: video_id (from previous request)

If condition:

• Condition: $json.data.status === “completed”
• True: Go to publication
• False: Wait → recheck

Wait settings:

• Amount: By default (usually 30-60 seconds)

Cycle logic:

1. Request video status
2. If “completed” → continue
3. If “processing” → wait and check again
4. Repeat until ready

3.3 Set Accounts — Setting up for publishing

Purpose: Prepares parameters for posting on TikTok

JSON configuration:

{

“blotato_api_key”: “your blotato api key”,

“instagram_id”: “”,

“youtube_id”: “”,

“tiktok_id”: “your tik tok id”,

“facebook_id”: “”,

“facebook_page_id”: “”,

“threads_id”: “”,

“twitter_id”: “”,

“linkedin_id”: “”,

“pinterest_id”: “”,

“pinterest_board_id”: “”,

“bluesky_id”: “”,

“video_caption”: “{{$ ('Captions') .item.json.output}}”

}

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3.4 Upload → TIKTOK - Publish videos

Upload (upload to Blotato):

• URL: https://backend.blotato.com/v2/media
• Header: blotato-api-key
• Body: HeyGen video URL

TIKTOK (publication):

• URL: https://backend.blotato.com/v2/posts
• Target Type: tiktok
• Account ID: 2624
• Privacy Level: PUBLIC_TO_EVERYONE
• Content: title from AI+ media URL

3.5 Append or update row in sheet1 - Final update

Purpose: Updates the topic's status to “Done” and saves a link to the finished video

Columns Mapping:

• Topic: (match for recording search)
• Status: “Done”
• The result: HeyGen's finished video URL

Node connection diagram

Main stream:

1. Manual Trigger → Get trends → Generating a theme
2. Generating a theme → Append or update row in sheet → Scenario
3. Scenario → Captions → Generate Video1

Creating and publishing videos:

4. Generate Video1 → Get Video1 → If
5. If (True) → Set Accounts → Upload → TIKTOK
6. If (False) → Wait → Get Video1 (cycle)
7. TIKTOK → Append or update row in sheet1

AI connections:

• OpenAI Chat Model + Simple Memory + Rows → Generating a theme
• OpenAI Chat Model1 + Simple Memory1 + SerPapi → Scenario
• OpenAI Chat Model2 + Simple Memory2 → Captions

Required services and their settings

SerpAPI setup:

• Get an API key on serpapi.com
• Set up access to Google Trends
• Make sure you have your request limits

HeyGen setup:

• Create an account at heygen.com
• Get API keys for video generation
• Create your own AI avatar

Blotato setup:

• API key: In the API section
• Connect your TikTok account

System capabilities

Intelligent content selection:

• Trend analysis - only relevant topics from Google Trends Russia
• Prevent duplicates - checking previously used themes
• AI curating - selecting the most appropriate news topics
• Automatic update - always fresh content

Professional production:

• Realistic AI avatar - high-quality animation via HeyGen
• Russian voice - natural voice acting in the native language
• Optimized scenarios - structure for maximum engagement
• Attractive headlines - AI generation for TikTok algorithms

Automated publishing:

• Direct posting to TikTok - without manual intervention
• Ready to expand - support for other platforms via Blotato
• Full accounting of transactions - the history of all videos created
• Quality control - status check at every stage

System application

For news channels:

• Daily content - automatic creation of news summaries
• Current topics - always on trend thanks to Google Trends
• Professional presentation - high-quality avatar presenter
• Saving resources - replacing the film crew with AI technologies

For content agencies:

• Scalable production - dozens of videos a day
• Multilingualism - easy to adapt to different regions
• Customer branding - customizing an avatar for your corporate identity
• A/B testing - different versions of titles and feeds

For educational projects:

• News literacy - explanation of events in simple language
• Output regularity - a stable schedule of publications
• Objectivity - AI analysis without human prejudices
• Accessibility - complex topics in an understandable format

The result of the system

What happens is:

• Standalone news channel with AI presenter
• Relevant content based on real trends
• Professional quality videos and voiceovers
• Scalable production without team growth
• Full automation from idea to publication

This system turns news content creation into a fully automated process with a professional AI presenter!