Youtube is the lifeline of the internet if youtube is removed then half of the user wont take a net connection. Youtube can be use the way you want if you want to use for educational purpose you can if you want as entertainment purpose you canif you want to use it as technology update you can.
Youtube also give you anybody choice that they can make there videos and upload it to the youtube and you can earn from that video base on the view count on your video.people are using it as job they are earning there livelihood. Youtube always ahead in doing new things like the introduce 360 degree video youtube also support 4k video resolution. your one stop destination for your daily need.