Service Fabric is a distributed system platform that abstracts out much of the complexity of packaging, deploying and managing scale and reliable applications. There are plenty of cool online material that provide introduction on Service Bus, including videos. I will not repeat them myself, but instead provide links and a brief description about them.

https://docs.microsoft.com/en-us/azure/service-fabric/
Landing page for SF documentation

https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-overview
7-min long introduction with links to a couple of videos

https://azure.microsoft.com/en-us/resources/videos/index/?services=service-fabric
Lots of videos about SF

https://docs.microsoft.com/en-us/azure/service-fabric/service-fabric-create-your-first-application-in-visual-studio
Hello World!?! No, finally somebody created a simple example that is not called Hello World.