The podcast episode must be released, not merely recorded and unreleased. The typical release platform is Lex's podcast and that is what will be counted. It is usually also available on youtube, which counts. If Elon appears in a video on Lex's channel but it is not a podcast episode, it will not count. Only episodes after the creation of this market are eligible to be considered. End of the year refers to the end of 31st of December, 2023, Pacific time.