All features of the [Maps] application and some features of the [near] application will be disabled with the PlayStation®Vita system software update planned on March, 2015.
Functionalities of the applications will be removed automatically once users update their PlayStation®Vita.
The disablement of features will not affect gameplay.
https://support.us.playstation.com/app/answers/detail/a_id/5431
The YouTube application for PlayStation®Vita (PS Vita) will no longer be supported after 20 April 2015, and the application will cease to be available for download from PlayStation®Store on 28 January, 2015.
Users can continue to enjoy YouTube via the "Browser" application, and will be able to access their YouTube data, such as playlists and channels, by signing in to the same Google account via the "Browser" app and on other devices. (http://m.youtube.com)
https://support.us.playstation.com/app/answers/detail/a_id/5432
strange that they are stopping the support for these apps..