As with one or two other giveaways from DVDFab, the comments talk about some problems getting the activation key -- as in the past I expect the problem to be solved by tomorrow. AI needs to be trained -- the more training the better -- & having loads of people use it adds to that training, so in this case DVDFab is probably as interested in getting folks the key as they are in receiving it.
Why the focus on AI? China's government, like many other governments is pushing AI development, China maybe more-so than others, so it's probably providing all sorts of incentives. And realistically, DVDFab, which would be shut down in any western country, given their focus on DRM removal, needs the support of their gov, given the pressure western governments apply to China regarding (C).
Why are DVDFab's 2 video AI apps so slow? It's early in their AI development. Like most all AI, advancements will come, e.g., neowin[.]net/news/nvidia039s-instant-nerf-technology-turns-2d-photos-into-3d-scenes-within-seconds/
That said, what does increasing the fps [Frames Per Second] do for you? The answer surprisingly is maybe nothing... there's been debate in Hollywood, with some movies shot at 60fps [or faster], while very many stick with film's 24 fps, even though shot digitally they could go Much higher. The reason is that very many people prefer movies to look like film, and yes, you can tell the difference. When it comes to video you shoot, if you're serious about it, your camera, including the camera in your phone, likely already is capable of shooting 60 fps.
Where I'd expect smoother AI to make the most difference is with DVDs, and the product page says Smoother AI ties into their DVD Ripper, so no need to run the video through software twice. DVDs belong to the age of analog video, with its 29.976 fps [NTSC] & 25 fps [PAL], both interlaced. Video you shot with a camcorder, & those that were shot with a TV camera should conform to those FPS specs. Movies shot on film artificially achieved those frame rates by showing individual frames more than once. I'd expect that using AI software to increase resolution, compensate for interlacing [if/when present], and increasing fps, would make old video more than fit for the 4k screen.