It is very much possible and many people already do. If you are successful at it, you can even make it a full time job. I find it that it can be like a hobby. For example, if you like singing and you have a great voice you can make a video of yourself singing and post it and you will get money based on how many people liked your video. You can also make short documental videos like «The truth behind Bermuda’s triangle» or «Is Pele really the best footballer in the history» and learn a lot along the way. There are thousands types of videos that you can post in YouTube and earn money you just have to find the type that you like the best and start posting. However I personally don’t think will have YouTube channel. I don’t really like to be in pictures so it is not really for me, but if you don’t have that problem I advise you to at least try. Who knows maybe you will get many views and start earning real money.