You can watch it on youtube in two parts.
Man Actually Returns From the Dead After 3 Days Part 1 of 2
Man Actually Returns From the Dead After 3 Days Part 2 of 2
In part 2 of the video the late Barry Bernstein a Neuroscientist says that Cryptomnesia maybe the explanation for why he remembered his father. The problem with this is he was certified dead for 3 days in a morgue. You need brain activity as it is assumed to have anything stored that could be recalled. He also offered it maybe an hallucination again you need brain activity to create an hallucination. The most probable explanation which to neuroscientists is hard to consider is he really had a glimpse of the afterlife.