refactor: basic example from class component to functional component (#3934)

* refactor: basic example from class component to functional component

* refactor: toast component path

* refactor: bufferConfig prop

* refacotr: import component path

* fix: seekbar issue on iOS

examples/basic/src/assets/index.ts

@@ -0,0 +1 @@
+export * from './videos';

examples/basic/src/assets/videos/index.ts

@@ -0,0 +1,4 @@
+export const localeVideo = {
+  broadchurch: require('./broadchurch.mp4'),
+  portrait: require('./portrait.mp4'),
+};