In this video, I'm going to explain to you very briefly what a keyframe is in After Effects. And then we're going to apply that to our camera layer here. So a keyframe represents a moment in time where an action has been applied or movement has changed. So to demonstrate this more clearly, while selecting the camera layer, press P to bring a position and click this little clock icon here on the left. Now, you see this diamond shape has appeared on our timeline, and this is known as a keyframe. And this keyframe has stored information regarding these coordinates on your position.
So now if we drag it all the way to the end to four seconds, and then we change the position of the camera zooming in and then shift it slightly, I'm going to zoom in even more so that the picture covers the edge and you see that a new keyframe has been applied. And now this key frame stores the new coordinates. And as you drag the timeline, you will see that we have created movement in time.