When I generate a video, I usually start with a quick test using a fast model to fine-tune the prompt before switching to a pro model. For example, I may want a 4-second video and run the tests with Veo 3.1 Fast, but when I switch to the pro model, the duration automatically changes to 8 seconds. This has happened to me several times: I forget to adjust the duration and end up consuming twice the credits.
Related to this, it has also happened to me on multiple occasions that, while waiting for the video to be generated, during that time for reflection, I realize that some setting is not quite right or that I have a new idea. During generation, it is indicated that if I close the tab, the generation will be interrupted and I will lose the video, but it is not clear whether the credits are also consumed in that case.
If the credits are indeed consumed, it might be useful to have a button to cancel the video generation, consuming only half of the credits.