Stitch avatar clips into a reel with music

A button on a video project in Airtable calls the webhook. The workflow sets Finalize Video Status, then follows the project to its script generation batch, its script, the script's music and the selected script lines.

It collects each line's talking avatar video and sends them to Creatomate as one 1080 by 1920 MP4, with the background music looped underneath at low volume and faded out at the end. The workflow checks every 15 seconds until the render is done, then saves the link to the project's final_video_url field and updates the status. It is the last step after the script writing and lipsync workflows.