Oh, it gets even better. In his response to his first video, he actually isolates the sodium.
Link Removed by Moderator due to safety concerns
No need to rant about the part at 1:38- we all know it was pretty stupid; aside from that, he was able to extract considerable amounts of sodium metal, which makes the process feasible and places sodium production within the realm of possibility for a citizen chemist.
By the way, the pot is most likely stainless steel, making it inert from the reaction.