More explanation about Blockchain cases presented would be helpfull

I think, it would be very helpfull if further details were given in relation to the blockchain use cases presented, such as: Maersk issurance, Chinese pigs control, etc. For instance, who participate on the blockhain?, which kind of information each participant brings in? How it save time and increases the system security? The way it was presented was too abstract and any clarification on at least one case, would help a lot. Or even, some further reading explaining those.