Learning to play an instrument is incredibly difficult. It is especially tough if you're trying to teach yourself! It takes a load of time to perfect, but if you have the patience and the will to succeed, you can certainly learn.
This girl wanted to learn how to play the violin (which is a notoriously hard instrument to master), so she sat down and recorded herself practicing every day for two years. Watch her awesome progress!
Just goes to show that you can accomplish anything if you want it badly enough. Kudos to this girl, and I hope she continues to master the violin!