YouTube has decided to remove the built in Twitter and Google+ automatic sharing tools. The activity was introduced by Twitter many years ago wherein it allowed users to automatically post their YouTube activity to Twitter and Google+.
However, in response to this new update many users have argued regarding the same claiming that it was useful and convenient for them. This update will come into effect from the 31st of January and after which you will have to share your videos manually with the available Share Button.
Also automatic sharing to Twitter and Google+ via uploads or creator studio will be removed as an option. YouTube will also remove the ability to add social media links to channel banners.