Update README.md

Wanted to provide a more descriptive README, so that I can point to this repository and people can find all the related resources in one place.

Author: markmandel

README.md

@@ -2,6 +2,21 @@
 
 Example controller for TGIK talk.
 
+Covers:
+- Controllers
+- Getters
+- Informers
+- Listers
+- Cache Synchronisation
+- Rate Limiting Queues & Workers
+
+## Videos
+This sample repository was developed and explained across three episodes of the [TGI Kubernetes](https://www.youtube.com/watch?v=9YYeE-bMWv8&list=PLvmPtYZtoXOENHJiAQc6HmV2jmuexKfrJ) YouTube Series.
+- [TGI Kubernetes 007: Building a Controller](https://www.youtube.com/watch?v=8Xo_ghCIOSY)
+- [TGI Kubernetes 008: Continuing the Controller](https://www.youtube.com/watch?v=fWkK-zsFtlU)
+- [TGI Kubernetes 009: Finishing the Controller](https://www.youtube.com/watch?v=wqhKCiGsf1Y)
+
+
 ## Ideas/code stolen from...
 This repo vendors in client-go along with all of the appropriate dependencies.  The procedure followed is described by @ncdc in this [blog post](https://blog.heptio.com/straighten-out-your-kubernetes-client-go-dependencies-heptioprotip-8baeed46fe7d).