Delete subscription from youtube
HHow to delete subscriptions from YouTube ?
iPad mini (Retina) Wi-Fi, iOS 8
Open the Youtube app, make sure you are signed in.
View the desired subscription (use the 'three line button' to find 'My Subscriptions').
Tap the name of the subscribed channel.
Tap the button that says 'Subscribed'. It should change to a 'Subscribe' button.
You can also manage them from a web browser…