Er so this "Ultralytics" consulting firm just borrowed the name YOLO for this model and didn't actually publish their results yet?
The author of YOLOv3 quit working on Computer Vision due to ethical concerns. YOLOv4, which built on his work in v3, was released by different authors last month. I'd expect more YOLOvX's from different authors in the future. https://twitter.com/pjreddie/status/1230524770350817280
The intriguing part is that he has also done research in particle physics (as Ulatrlytics) that has been published in Nature [1].
I had never seen anything like that.