He mentioned that a few animals have been resurrected in a slightly different way already. Eg. the Red Factor Canary was resurrected by breeding a Domestic Canary and a Red Siskin. Apparently the offspring had enough geno/phenotypic resemblance to the original Red Factor Canary that this newly created lineage was given that original name.
The animal that resulted died of lung complications shortly after birth, but apparently veterinarians indicated that these complications were totally within the norm of ibex ontogeny, and probably not a failing of the underlying cell biology.
So, for just a few minutes, an extinct species was brought back to life.
Even today the idea of add new blood to the remaining (and very inbreed) populations of wild goats is often mission imposible blocked by hunter's lobbies.