Head Transplant and the Non-Existence of the Soul

A video essay by Jacob Geller analyzing the depiction of head- (or consciouness-) transplants in video games such as Wolfenstein 2 or Soma in parallel with the history of the almost-father of head transplants (his experiences having been limited to monkeys), Robert Joseph White. How did we end up moving the center of human consciouness from the heart to the brain ? Where does the soul come in to play here? When is the body / Theseus' ship no longer the body / Theseus' ship for having had its limbs / its wood transplanted too much ?