YouTube-Android-Player-API
https://developers.google.com/youtube/android/player/

Source-code-The-YouTube-app-YouTube-Activity
https://drive.google.com/uc?export=download&id=1knglXLYk2ZtODr8GpJvbreBmm2sYEnFM

Source-code-The-YouTube-app-Adding-Widgets-Dynamically
https://drive.google.com/uc?export=download&id=16HTDWWxA5xMTJqb8y4u_hEURoHP8Q_bC

Google-APIs
https://console.developers.google.com/

The-Complete-Java-Developer-Course
https://www.youtube.com/watch?v=LpizdiL5kvk

Source-code-The-YouTube-app-Add-Key-to-Code
https://drive.google.com/uc?export=download&id=1Kch671XDsf1eeYwnucqpm05khrVGLArZ

YouTubeInitializationResult
https://developers.google.com/youtube/android/player/reference/com/google/android/youtube/player/YouTubeInitializationResult

Source-code-The-YouTube-app-The-YouTube-Player
https://drive.google.com/uc?export=download&id=1ufYN0iUlUoxF0l9L7Nyynv98sChAOUk5

Source-code-The-YouTube-app-onInitializationSuccess-Method
https://drive.google.com/uc?export=download&id=1XIbg_ksBrDGzaphbB839eE3LrkoQtTh4

Source-code-The-YouTube-app-Adding-Listeners
https://drive.google.com/uc?export=download&id=1t1MBUtyn6eBmB0DVLCK0XVVHRLxROxOP

Source-code-The-YouTube-app-Improving-the-Player
https://drive.google.com/uc?export=download&id=1Cpuhhzz-EneewJyldohrDV6sDg-k0Lt-

Source-code-The-YouTube-app-Extending-App-Layouts
https://drive.google.com/uc?export=download&id=1NfGQGAoQgWra7GGNlPFEUrBXlPNWtvGy

Source-code-The-YouTube-app-Extending-Youtube-App-Code
https://drive.google.com/uc?export=download&id=1tD1fbesgT10tR4-swUVFodKLIgtwTUNj

Intent
https://developer.android.com/reference/android/content/Intent.html

Intents-and-Intent-Filters
https://developer.android.com/guide/components/intents-filters.html

YouTubeStandalonePlayer
https://developers.google.com/youtube/android/player/reference/com/google/android/youtube/player/YouTubeStandalonePlayer

Source-code-The-YouTube-app-Implementing-Intents-and-Challenge
https://drive.google.com/uc?export=download&id=1ugVQ_8LxnLUqrCGLWwi-x2s08BBktwXC

Source-code-The-YouTube-app-Challenge-Solution
https://drive.google.com/uc?export=download&id=1NatqoMucuW_Sr--d4572A0WKdSxo-2-R

Source-code-The-YouTube-app-More-Error-Handling
https://drive.google.com/uc?export=download&id=1RmwTegrlwDAqWNdotKFV2mEEyleH26bC