The Video Creator Stack

Script, generate, edit, and caption AI video end to end

This workflow takes you from idea to a finished AI-generated video, combining five complementary tools that each handle a specific phase of production. You end up with a polished video featuring custom footage, a lifelike avatar presenter, clean audio, and professional captions — all without touching a camera. The power comes from the sequence: Runway creates high-quality raw clips, Kling adds camera control and lip-sync, HeyGen brings in a talking head, Descript lets you edit by just editing text, and Captions auto-polishes the final cut. This stack is built for content creators, marketers, and educators who want to produce professional video at speed, with minimal manual editing. Each tool earns its place by doing one thing exceptionally well and passing a clean asset to the next step.

The workflow, step by step

1
Generate base video clips
Runway
Use Runway Gen-4.5 to create high-quality video from text prompts or images. Its world models produce realistic, consistent clips that form the visual foundation of your video.
Hand-off → Raw video clips with consistent style.
2
Add camera control and lip sync
Kling AI
Kling offers precise camera movement and lip-sync capabilities, enhancing the base clips. Apply dynamic shots and sync lip movements to your script for more engaging visuals.
Hand-off → Enhanced clips with controlled motion and synchronized audio.
3
Create avatar narration
HeyGen
HeyGen generates lifelike avatar videos with accurate lip-sync and optional translation. Ideal for adding a presenter that speaks your script naturally.
Hand-off → Avatar video with accurate lip-sync.
4
Edit video by editing transcript
Descript
Descript lets you edit video by simply editing the text transcript — trim, rearrange, and add effects or overlays without timeline wrangling. It's the fastest way to assemble your rough cut.
Hand-off → Rough cut video with polished audio and captions.
5
Auto-polish and add professional captions
Captions
Captions automatically reframes, cuts silences, and adds dynamic captions with professional taste. One click polishes your video for social platforms.

AI Video

Frequently asked questions

How much does the full video creator stack cost?

Each tool has a freemium tier, but for serious use expect to pay around $50–100/month combined. Runway and Descript offer affordable paid plans, while HeyGen and Kling have usage-based pricing. Start with free trials to test the workflow.

Can I replace any tool with a free alternative?

Yes, to some extent. For editing, DaVinci Resolve is powerful and free, but lacks AI transcription. For video generation, you can use free tiers of Runway and Kling, but output limits apply. No single free tool covers the whole stack.

Where should I start if I'm new to AI video?

Begin with Runway to practice text-to-video prompts. Once you have a few clips, try adding a simple avatar with HeyGen. Then use Descript to combine them. The learning curve is gentle; each tool has tutorials.

What's a common mistake when using this stack?

Skipping Descript and trying to edit everything in Captions or manually. Descript's transcript-based editing saves hours. Also, mismatching lip-sync across tools — make sure audio and video are aligned before exporting.