Fixes and clean up (#51)

* Simplify main

* Fix init

* Cleaner output for the end user

* Fix extractVideoGuid after sync with dev

* TokenCache: Make variable private

nit: switch to import

* Add option to disable video thumbnails

* Create a unique file name to avoid overwrite

* Remove os dependency

* Reimplement simulate

* Update README

Co-authored-by: @kylon
Co-authored-by: @snobu

Types.ts

@@ -5,6 +5,7 @@ export type Session = {
 }
 
 export type Metadata = {
+    date: string;
     title: string;
     playbackUrl: string;
     posterImage: string;