So let us summarize, shall we? Your initial claim was:
Which, by itself, was misworded as the topic of discussion was the evolution of body plans.
Regardless, when asked to substantiate your claim, all you could come up with is a Youtube video that you think you remember, but which may not even exist. And, by your recollection not even you found the claim in the video to be plausible.
This illustrates an important point: Those who are taken in by ID propaganda are not just uninformed or misinformed. They are fundamentally unable to think properly.