Automated YouTube SEO, Thumbnail Generation & Video Upload via AI, Google Drive & LemonFox
Automated YouTube SEO, Thumbnail Generation & Video Upload via AI, Google Drive & LemonFox Pre-requesties: Video uploaded to gdrive. And sponsor file with the similar formart "videotitle_sponsors.txt" Node-by-Node Functional Breakdown This workflow is an end-to-end "Content-to-Publish" engine. I’ve broken it down by the specific stage of production: Stage 1: The Intake & Access | Node Name | What it does | | :--- | :--- | | When File Added in Drive | The Trigger: Watches your "transcript" folder. The moment you drop a video file here, the engine starts. | | If Video Mime Type | The Gatekeeper: Ensures the file is actually a video (e.g., .mp4) and not a random document or image before proceeding. | | Grant Temp File Access | The Key: Temporarily changes the Drive file's permissions to "Anyone with link" so external AI tools (LemonFox) can download and process it. | Stage 2: Transcription & Data Prep | Node Name | What it does | | :--- | :--- | | Post Audio to Lemonfox | The Ears: Sends the video to LemonFox AI to extract the spoken word into a structured SRT (subtitle) format. | | Clean SRT Content | The Editor: A JavaScript node that cleans up technical formatting issues and unescapes characters to make the text readable for the AI. | | Create Text File in Drive | The Archive: Saves your clean transcript back to Google Drive for your records. | | Search/Fetch Sponsor Info | The Researcher: Looks for a specific .txt file named after your video that contains sponsor details (Name/Email) so they can be credited. | Stage 3: AI Strategy & Creative | Node Name | What it does | | :--- | :--- | | Content Analysis Agent | The Strategist: Uses Gemini to analyze the transcript and find the "Big Idea." It then writes a high-CTR Title, SEO Description, and Tags. | | Parse Structured Output | The Translator: Ensures the AI's creative writing is formatted as strict JSON so the next "Upload" step can understand it. | | Generate Thumbnail Image | The Artist: Takes a specific "Thumbnail Prompt" written by the AI and uses Gemini (Nano Banana) to generate a high-quality 16:9 image. | Stage 4: Publishing & Cleanup | Node Name | What it does | | :--- | :--- | | Upload to YouTube API | The Publisher: Hits your upload endpoint, sending the original video link, the AI-generated metadata, and the AI-generated thumbnail. | | Delete Original File Permissions | The Security Guard: Immediately revokes the "Anyone with link" access to your Google Drive file, locking it back down for privacy. |. An n8n automation workflow template by iamvaar.
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