Youtube for smartphone :ios-android-windows phone

Youtube for smartphone

Many people search an application Youtube for smartphone
in this article i want to introduce this program for android, ios, and windows phone.
1-Android you can search in google play , youtube is a free app.
LINK

2-Ios also free in market ios "Itunes".search in program itunes .

3-As for windows phone , app youtube there is in market windows phone .
LINK