doc: Recorded screencast and updated of readme

... to be more attractive. Inspired by https://github.com/faressoft/terminalizer/blob/master/README.md

README.md

@@ -6,8 +6,11 @@
 [![All Contributors](https://img.shields.io/badge/all_contributors-13-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
-- [OSXPhotos](#osxphotos)
+> OSXPhotos provides the ability to interact with and query Apple's Photos.app library on macOS. You can query the Photos library database — for example, file name, file path, and metadata such as keywords/tags, persons/faces, albums, etc. You can also easily export both the original and edited photos.
-  * [What is osxphotos?](#what-is-osxphotos)
+
+<p align="center"><img src="docs/screencast/demo.gif?raw=true" width="713" height="430"/></p>
+
+# Table of Contents
 * [Supported operating systems](#supported-operating-systems)
 * [Installation instructions](#installation-instructions)
 * [Command Line Usage](#command-line-usage)
@@ -39,9 +42,7 @@
 * [Acknowledgements](#acknowledgements)
 
 
-## What is osxphotos?
   
-OSXPhotos provides the ability to interact with and query Apple's Photos.app library on macOS. You can query the Photos library database -- for example, file name, file path, and metadata such as keywords/tags, persons/faces, albums, etc. You can also easily export both the original and edited photos.
 
 ## Supported operating systems