Own player controller script let the view wobbles but why?

Hello Unity friends,
I have an problem with my little player control script when i rotate and move the player in one time.
The nice fail can you see here: https://kacklappen.tinytake.com/tt/MzY2ODcxNF8xMTEyOTcyMg
and my 'nice' script can you see here:

Code (CSharp):

1.      private void Update() // rotate part - actually rotate only on y axis
2.      {
3.          vert = Input.GetAxis("Vertical");
4.          hor = Input.GetAxis("Horizontal");
5.          yaw += rotSpeed * Input.GetAxis("Mouse X");
6.          transform.eulerAngles = new Vector3(0, yaw);
7.      }
8.      private void FixedUpdate() // move part
9.      {
10.          if (vert == 0 && hor == 0)
11.              return;
12.          transform.position += ((transform.forward * vert) *moveSpeed + (transform.right * hor) * moveSpeed);
13.      }

Thank you for help

 

Start by reading what Time.deltaTime does. Then you will understand many of your issues.