if its a specific file, you can download it and drag the downloaded file into the podcasts node where it will by default be assigned to a "Unknown Subscription"
if its a subscription you are refering to, just go to the podcasts node and click + where you can enter the web link directly
I can't really drag the mp3 file anywhere, it shows the symbol of me not being able to do it :c.
edit: ooh, you have to do it in musicbee itself. Thanks for the reply. Is there a way to give it a name instead of ''Unknown subscription''? Because this way everything would go into the same thing, which could get confusing. I know multiple podcasts that just use download links.
For now as a workaround I just created a library for podcasts, just like I did with videogame/movie soundtracks.