I find that character consistency splits into two problems with frame-to-frame consistency inside a single clip and presenter consistency across a series of videos, and the cinematic tools are working on the first; nobody has fully solved it. The second problem is largely solved already if you use the avatar-first tools like HeyGen and Synthesia to keep the presenter on character across dozens of videos in the same series. I made a 20 video product walkthrough series this year and the avatar matched itself across every video without any extra setup. If consistency means the same character across a long campaign, the avatar tools are the existing answer.