I don’t think I am your intended user, but can you elaborate on what the scenario is where pausing and screenshotting (space, cmd+shift+3) is more of a hassle than the three-step process described on the landing page?
If you want to take more than 3 screenshots then this would be faster. Usually you would have to stop the video and select the screenshot area. Plus I'd like them to look a bit nicer than a normal screenshot.
The purpose I made this was to create additional content from videos (blogs, social media posts). So, I plan to add some additional stuff like export to .webp to optimize size or different aspect ratios.