How to tune a stringed instrument video links

Hello!
Here are three videos about how to tune a violin/viola and cello.  The first video tells why and how we use the pegs and fine tuners.  Here is the link:  https://youtu.be/qbufOE9Ya0Q
 
This video shows how to use the snark tuner to tune a violin:
 
Remember the names of the strings from left to right on a violin are G, D, A and E.  On the viola and cello the strings from left to right are C, G, D and A.  
Here is a link on how to tune a cello. (I don't like that he is using his bow.  Just pluck the string with your right hand and tune with your left hand.)
 
Please be very careful tuning your stringed instrument because if you turn the peg too tight it will snap.  Turn your pegs in very small increments while pushing the peg in.  Remember "righty tighty - lefty loosey" .Good Luck!