For example, the green hoodie right at the front stays green throughout the entire video but Christian clearly moves while he is wearing it.
As most people have figured out the hoodies slowly change colour before Christian moves but it's so subtle that you barely notice.
This isn't the first time that Christian has made a video like this as he often goes viral on TikTok with his clever creations.
In a YouTube video he explains how he make many of his clips, including the one above. He says: "I just colour keyed it so that I could isolate the colour green, which is the actual colour of the jacket.
"You can see here, if I turn on the hue, saturation and lightness effect, it will show the actual colour of the jacket."
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