His assertion 3 minutes in that it would not be possible or desirable to encode a message in the DNA is utter nonsense.
It would be ridiculously simple to encode such a message from the creator and protect it from loss by mutation.
In fact storage of information in DNA is an active field of investigation.
If the creator had encoded a simple signature in the code of every living thing we would not be having this debate.
He gets off to a really bad start in his argument