docs: move intro video before example section

Author: nodkz

README.md

@@ -38,6 +38,14 @@ import { composeWithMongoose } from 'graphql-compose-mongoose/node8';
 import { composeWithMongoose } from 'graphql-compose-mongoose/es';
 ```
 
+## Intro video
+
+Viktor Kjartansson created a quite solid intro for graphql-compose-mongoose in comparison with graphql-tools:
+
+<a href="https://www.youtube.com/watch?v=RXcY-OoGnQ8" target="_blank"><img src="https://img.youtube.com/vi/RXcY-OoGnQ8/0.jpg" alt="#2 Mongoose - add GraphQL with graphql-compose" style="width: 380px" />
+
+<https://www.youtube.com/watch?v=RXcY-OoGnQ8> (23 mins)
+
 ## Example
 
 Live demo: [https://graphql-compose.herokuapp.com/](https://graphql-compose.herokuapp.com/)
@@ -661,11 +669,3 @@ This plugin adds `pagination` resolver.
 ## License
 
 [MIT](https://github.com/graphql-compose/graphql-compose-mongoose/blob/master/LICENSE.md)
-
-## Intro video
-
-Viktor Kjartansson created a quite solid intro for graphql-compose-mongoose in comparison with graphql-tools:
-
-<a href="https://www.youtube.com/watch?v=RXcY-OoGnQ8" target="_blank"><img src="https://img.youtube.com/vi/RXcY-OoGnQ8/3.jpg" alt="#2 Mongoose - add GraphQL with graphql-compose" style="width: 380px" />
-
-  <https://www.youtube.com/watch?v=RXcY-OoGnQ8> (23 mins)