So, this is a personal opinion of mine that a lot of video generation tools are missing the extension of the video generation via an extract last frame tool.
This would allow users to stay in Veras and keep working on extending the videos longer than what a single generation offers, and also create seamless results with a wide variety of styles.
The substitute workflow is to download the video, open it in another app like After Effects or premiere and, extract the last frame, and bring it back into Veras to keep working on it.
Suggestion - the library ffmpeg would be a good way to solve this (if it is seen as a good feature to add)