Replacing layers

Very often, when you are working in After Effects, your producer or manager,…client or whatever, will come back to you and say, "I know you have been…working on this a lot, but what I want to do is swap out the footage you have…been working on with something different."…Now, that can pose a lot of challenges.…In this case, I have been working on this olive sorting 01 clip.…I've added a mask to it and created a vignette with it.…I've also created this like texturing effect and I have also-- If I go to the…Effects Controls panel, you'll see I have also applied little bit of Levels.…So, there is before and after Levels, a little bit of contrast.…

And I have also de-saturated a little bit.…So, before and after the saturation.…So, I have already done a lot of work to this.…I have even come down here to the Timeline panel and I've cropped this in time.…So, it's only five seconds long as opposed to 40 seconds long.…So, I have been doing a lot of work with this thing.…So, if my client or boss or whatever came back to me and said, "I need the…