RunningHub workflow：

https://www.runninghub.ai/post/2067429460936323074/?inviteCode=rh-v1497

Sign up through my link to receive 1,000 credits, then claim 100 credits with each daily login.

YouTube tutorial：

Overview

Using a dual‑mask system and WanSCAILToVideo, it seamlessly swaps any character—human or animal—while preserving background integrity. Lip‑sync alignment ensures the replacement matches the original speech, and the long‑endurance looping handles extended clips.

Core Features

- Dual‑Mask Character Replacement: Two masks precisely separate character from background for clean swaps without edge bleeding.

- Lip‑Sync Alignment: Automatically align the replacement character’s mouth to the reference video’s speech, enhancing realism.

- Cross‑Species Support: Replace characters with animals (e.g., dancing cat) without distortion—tested and proven.

- Long‑Video Optimized: Same low‑spec, long‑endurance design with built‑in looping for stable performance on extended footage.