A YouTube application is now available for Switch via the Nintendo eShop as a free download.
Here is an overview of the application, via the Nintendo eShop:
Kick back, relax and enjoy all of YouTube on your Nintendo Switch. There’s entertainment for everyone, like music videos, movies, gaming live streams and the latest viral sensations. Explore a world of videos with personalized recommendations and easy access to your channel subscriptions. So grab your friends, family and your controller, and enjoy YouTube together.