Auto-Caption Instagram/TikTok Videos with Google Drive & Submagic

This workflow streamlines video content creation for social media by automatically adding engaging captions to videos destined for Instagram and TikTok. When you upload a video to a designated Google Drive folder, the workflow triggers instantly, sending the video URL to Submagic's API with your preferred caption template (e.g., Hormozi style). It then intelligently polls Submagic until processing is complete, downloads the captioned video, and uploads it back to Google Drive—fully optimized and ready for posting.

The process eliminates manual editing: no downloading, processing locally, or re-uploading required. Key nodes include a Google Drive file creation trigger, HTTP requests to Submagic for job submission and status checks via a wait loop, file download, and final upload. This cloud-based automation handles everything seamlessly, supporting high-volume content pipelines.

Benefits include massive time savings (hours per video reduced to minutes), consistent caption styling across posts, and zero local processing for scalability. Ideal for marketers, influencers, and agencies producing Reels or TikToks regularly. Use cases: daily social media scheduling, batch video processing, or integrating into broader content workflows.

Requirements: Google Drive OAuth credentials, Submagic API key, and n8n instance (cloud or self-hosted). Perfect for enhancing Instagram/TikTok engagement without technical hassle.