ElasticSearch and Kibana Introduction

I was looking for an introduction. It seems you already have everything set up here

I'm getting this error when trying to create index: "no handler found for uri [/temp_index/people?pretty=true] and method [POST]" any suggestions?

Very helpful it provides direction

In my kibana, when i am defining datatypes it is showing that it is deprecated. Why is it so?

Why did they remove mapping types just curious.

Near the end of the video, I say Inverse Term Frequency, but what I mean to say is Inverse Document Frequency.