The first video is about setting up your own free server in the Amazon cloud.
The second video is about creating your first service on that server.
The third video is about calling a traditional (SOAP) service and return the result in a more omnichannel-friendly format (JSON).
The fourth video is about how you can access a database from your omnichannel service.
The fifth video is about how an omnichannel service can provision dynamically sized images.
The sixth video is about how to make sure that only new or updated data is sent back from your omnichannel service.
The seventh video is about the importance to use unique identifiers as keys to your data.