message: add getting started video to readme
diff: @@ -7,6 +7,7 @@ Searchkit is a Graph QL / React UI Component framework to:
  - A great Search experience without needing to be an expert in Elasticsearch, React and Node
  #### Highlights
  +- [Getting Started Video](https://www.youtube.com/watch?v=4vHibwubrQA)
  - [Website](https://searchkit.co/)
  - [View Demo](https://demo.searchkit.co)
  - [Documentation](https://searchkit.co/docs)
  