Some random possible ideas for radio show stuff:

• People watch a terrible and have to explain why it’s a masterpiece
• The above but with any other form of media
• Cool things/resources you’ve found on the internet
• New tech things on the horizon
• How events in history would’ve been different if the people involved had had access to the internet
• People talk about a weird/uncommon hobby they have

Hopefully these are good! I have to admit I’m not too great at coming up with ideas for these.