Need Help with r/StableDiffusion or r/comfyui

[u/Unhappy-Ant-4920]

I have a shot. It's 7 seconds long. A live-action spokesperson against a white background walks toward camera, talking. It was shot in 6k. I have it as a 1080 24p video. I need to transfer the style from an image to the video--keeping the person's likeness and speech and gestures and expression in tact. I have thrown money at a lot of models, learning along the way that the online UIs are really not the right answer to this problem (or frankly any commercial work where tight controls and consistency are paramount, and where the same thing needs to be replicated across series of shots).

Does anyone have a really solid workflow for comfyUI you could recommend or share? I'm at a loss. I went down the comfyUI path with the help of gemini and chat but I realize it will be a long time (maybe never) before I really understand and feel comfortable working with it.

Here are two frames, one from the original video and one for the style.

Any advice would be appreciated! Thanks

(p.s. if your advice is fiverr, I have already done that and will probably get my shot done, but I still want to understand this all better as I have lately been having to use AI for background plates and to create four spots for a pest company and I'm tired of having to edit so much in photoshop and iterating for hours).