AI Viral Video Generator & TikTok Publisher

AI Viral Video Generator & TikTok Publisher

Turn a content calendar in Google Sheets into published TikTok videos without touching a camera or editor. A Cron trigger reads your video topics, generates short clips via the Google VEO 3 API, and uploads each one directly to TikTok through the Content Posting API.

What this workflow does

1. WeeklySchedule — Cron fires on your publishing schedule (default: Mon/Wed/Fri at 09:00)
2. ReadContentCalendar — Google Sheets reads the next batch of unpublished video topics
3. IterateTopics — Loop over each topic row
4. GenerateVideo — POST to the VEO 3 API with the topic prompt and receive a video URL
5. UploadToTikTok — HTTP node posts the video URL to the TikTok Content Posting API
6. MarkPublished — Google Sheets updates the row status to "published"
7. PublishSummary — Output captures the final batch count

Use cases

• Social media agencies managing multiple brand accounts
• Content creators who batch-produce short-form video on a schedule
• Marketing teams running always-on TikTok campaigns from a content brief

Setup

1. Get a VEO 3 API key from Google AI Studio and add it to the GenerateVideo HTTP node as Authorization: Bearer YOUR_VEO3_KEY.
2. Get a TikTok Content Posting API access token (via TikTok for Developers) and add it to the UploadToTikTok HTTP node.
3. Create a Google OAuth credential in Heym and connect it to both Google Sheets nodes.
4. Set your spreadsheet ID and sheet name. Expected columns: topic, hashtags, status (blank = unpublished).
5. Adjust the Cron expression and row range to match your posting cadence.

Notes

• VEO 3 generates 4–8-second clips from text prompts; keep topics short and vivid for best results.
• TikTok's Content Posting API requires app approval — apply via the TikTok Developer Portal.
• Add a Wait node between iterations if you hit VEO 3 rate limits.