@lnxw48a1 Some random ideas: 1. You have recently relocated; speak about the significant differences in your new location. 2. You spent some time in verbal "battles" with GNU Social bots in the past; discuss bot technology perhaps? 3. I first encountered you via a mailing list that @NYbill maintained; speak about email encryption and GPG; look at the current EFAIL exploit?
Please ignore as you see fit 
@lnxw48a1 @perloid for me, I've found I can't set a time to record. I have to be jazzed up about something. An electronics project, troubleshooting something, a new piece of equipment, a software challenge & solution, etc...
I just keep a recorder in the computer/electronics room or in my backpack when out. When the mood strikes, I hit record and ramble.
Don't worry about um's and er's or long pauses. Audacity if your friend.