Have seen that video tashja, in fact have linked to it somewhere. When Rajesh was pushing his idea re BH density, I raised it then. Again though, Thorne does not believe that the classical point singularity exists [says so in his book, "Black Holes and Time Warps"] and neither does any self respecting cosmologist I would hasten to add. Most believe a surface/mass of sorts does exist between the Planck/Quantum level and the point. His inference was a BH is 99.9% curved spacetime and so to speak of a BH density is not really applicable. [Even considering this surface at the Planck/Quantum scale.