Ban recently shared that he have spent very long time making a map that would be shown only 20 seconds in his video. His post He asked was it worth it?
My response: Everything is worth it! Step by step, little by little make improvements on your animation
I spend hours drawing this Mark V tank with firing cannons and animated tracks only to be shown in like 4 seconds in the animation. And there are numerous examples as this. I'm not speaking of the things I spent time on and they didn't even make it in the video.