Nintendo Switch is a little more of a multi-purpose device today, with the addition of a YouTube app. You can now download the YouTube app through the Nintendo eShop for free, and notably you don't need Nintendo's online subscription service to use it.
The app allows you to watch anything in YouTube's catalog in both docked and handheld modes. That includes tons of original content from users, along with livestreams, how-to guides, music, and more. You can log in with your Google account to access your preferences, playlists, and recommendations.
YouTube is just the second streaming video service to come to Nintendo Switch, after Hulu was added in November 2017. The company is still exploring bringing other video apps like Netflix to the console.
Nintendo Switch is first and foremost a gaming device, and hasn't pursued multimedia functionality as aggressively as its competitors, PS4 and Xbox One. Nintendo just recently started up its own paid service to play most games online, and threw a few other perks into the mix for good measure. It also gives access to cloud saves, and a growing library of classic NES games. This month it will add three more games. Fortunately, though, video services are exempt from the online requirement, so you can stream to your heart's content even if you haven't signed up for the service.