There's also a lot of pressure to deliver weekly episodes if that was your goal. I think at some point you become unable to reflect that you're approaching burnout and should have taken a break twenty episodes ago.
A lot of people I've known in this space have run into the problem where making content became their job and it meant they weren't doing the "real work" that created fuel for creating the content. That is, the best content came from talking about the challenges and techniques learnt in their "day job" but now their day job was running a screencast/tutorial business.