Please share your experience using 'flow control' xblock

Hi,

I am exploring ‘flow-control’ xblock which was created by eduNEXT. Can anyone share example link/video of this xblock. I read this article but the information given is insufficient for me to understand. Can anybody having experience with this xblock share video clip(using loom) or useful link. A video clip using loom would help better to clear the concepts. Thanks in advance!