YouTube is a core app in the Android ecosystem, and it gives users a way to connect to Youtube video-sharing website. Read more about YouTube  

The Youtube app is present on most Android devices, so users should already be familiar with it. It provides access to the Youtube video-sharing website and has the same functionality as the regular desktop experience.
This is the official app from Google and users can see what the world is posting, make their own videos, comment, and discover new channels of entertainment.
All you have to do is to tap the video you like or to swipe through the channels; it’s that easy. If you find something that you like you can subscribe to the channel, making it easier to see what they are posting.
Also, uploading and editing videos is quite an easy task, and the app comes with all the required tools and filters.