Let's get involved with the YouTube community by liking, commenting, and subscribing to other people's videos. So you'd scroll down after you've watched a video that you've found that you really, really like. You'd click the "Like" button. Then automatically like it can show you how many people have liked it or disliked it. We would scroll down now, and now we can leave a nice little comment - "This is awesome! Can't wait to try it!" Then you click "Post" and your comment should be posted where everyone can see what you've written. If you really like a video, you can click the "Subscribe" tab and then you can be updated every time that user posts a new video. Also, checking this box can allow you to be notified every time a video is posted by e-mail instantly.