Social Audio
If you haven't considered the power of social audio, go and listen to Social Audio as a Vector For Engineering Wisdom by Bryan Cantrill, who also happens to be one of my very favorite speakers.
We borrowed from Oxide and Friends when we started our own live show, Path To Citus Con Podcast: For Developers Who Love Postgres which we host on the Microsoft Open Source Discord and is available on Transistor, YouTube, and all of your favorite podcasting platforms.
Ours began as a pre-event for Citus Con: An event for Postgres, and continued on after the event as a fully-fledged live show & podcast. I credit the "social" aspect as being a huge driver behind its success, which I don't think would have occurred if it had begun as a stand-alone podcast.