Clooz 4 help topics and videos are provided online at https://support.clooz.com. The Clooz User Guide provides this content in the form of a pdf file, downloadable at: https://downloads.clooz.com/Clooz4UserGuide.pdf.
There is still a series of 12 Getting Started with Clooz videos available, but they refer to Clooz 3. Many of the concepts in Clooz have not changed, so you may still find value in watching them even though you are using Clooz 4.