If you own a PS Vita and like YouTube, well Sony has now made a number of improvements. The app now has the ability to add channels and subscriptions, better controls, and as well as to create playlists and support for closed captions, continuous playback and search filters. It has also Twitter and email support to be able to share your favorite video.
It also can use buttons now so need to rely on the touchscreen, which to me is the best improvement on the update. While you at it you might as well check our Youtube Page and see how it functions on your Vita. For more Detailed of the improvements click here.
Source: PS Blog