You can find them on Twitter as Samantha linked to the page before the interview. She's a UK based twitch gamer and it was a community interview thing. Idk about when it will be available but might be a VOD on Cressup's twitch until then. Ending spoilers obviously dodged but they did touch upon Sam's feeling about that, the scene added in Act 3 and how Karlach came to be. Which I personally found pretty good tellers as for Karlach's development process that in the end also influences/d the ending process.
