Never, because it's always relative.
By observing the object
Yes, it all depends on the point of view. An object can be at rest for one observer, and in uniform motion for a different observer.
One point of view from which to describe motion is the observer's frame of reference. This point of view defines the position and motion of an object relative to the observer. By choosing a specific frame of reference, we can describe how an object moves in relation to that reference point.
Not change, from the frame of reference of the object, that being more or less the whole point of special relativity.From the point of view of an outside observer, it will contract along the direction of motion.
The change in an objects position is called motion.
[object Object]
Relative motion is : The comparison of motion between two different objects from the view of another object
[object Object]
Frame of reference
Both are 3D view of an object. With perspective view, the far end of the object looks smaller (think "vanishing eye point"). With isometric view, the near and far end of the object looks the same.
Stories can be told from the 'audience' point of view -- viewers know everything about every character, or from the point of view of a single character. You can analyse any film to discover the point of view from which the story is told by making a note of the characters in every scene.
Whether the object is moving from left to right across the field of view, or from right to left.