Once you have drawn an animation path, you can move any control point including the camera start point if you want. When you move a control point, the path automatically adjusts to maintain a smooth, curved path.
To move control points on a path:
Click on the camera or any point on the path to select the path. Blue grab handles appear at each control point.
Hover your pointer over the control
point you want to move. This displays the Move cursor.
Click and drag the point to the desired location, then release your mouse button.