This is Stephen Crothers' talk at the Electric Universe 2013 conference, "The Non-existence of the Black Hole and the Failure of General Relativity". He seems to deliver short mathematical refutations of mathematical solutions of Einstein's equations which lead to Black Holes. I don't have the knowledge to judge the validity of it, anyway I thought I'll share it here:
_https://www.youtube.com/watch?v=Q185InpONK4
_https://www.youtube.com/watch?v=CHZ5O0jTH8A
_https://www.youtube.com/watch?v=Q185InpONK4
_https://www.youtube.com/watch?v=CHZ5O0jTH8A