Ooo... *cracks knuckles and flexes teacher muscles*. We see three issues that are fixed by a podcast version of your course.
1. The screen: Right now, courses are expected to be consumed in a browser on a computer while watching a video. This requires the student to face the screen and not be distracted. On that screen is Slack, Messenger, Facebook, your inbox, all with little numbers in parentheses or red dots telling you to look there!
With a podcast, you're able to do the dishes, take a walk, drive your car, all while focusing on the audio. As long as you're not reading, you can listen to audio content and retain the information. The moment you read a Slack notification, your brain turns off the lesson and that information is lost. On your computer, it's just about impossible to avoid reading something while trying to learn.
2. The mp3's: Some courses provide audio files in each lesson. You download them on your phone, but then what? Where do they go? Do they play in the correct order? And continue on to the next one when it's finished? And continue playing if you lock your screen? Maybe. But likely it's a disorganized mess of mp3 files with names like Mindset_Work_edited_final-v2.mp3 which comes after Closing_remarks.mp3. And then there's Module-5_Lesson-2.mp3 which was never updated after the course redesign and is now actually Lesson 4 from Module 3. No bueno.
The podcast feed is organized, in order, playing continually one lesson to the next. You can play through your car speakers, an Amazon Echo, anything that podcast players connect to. And they're intended to play while your phone is in your pocket while you're walking around doing something else. (But not reading notifications!)
3. "Lesson Complete" indicators: We're strong proponents for Spiral Learning: "each time a student encounters the topic, the student expands their knowledge or improves their skill level," (reference, and a detailed article). Content should be encountered multiple times and in multiple ways. Each encounter makes a small dent in the brain and creates an attachment point for the next time they experience the content. Marking a lesson or module as "complete" trains the student to move on and never look at that content again.
Instead, if they binge your entire course in audio form, they see where you're taking them and what to expect, without the pressure of "completing" a worksheet or task that may hold them back from moving on. THEN they can go back and watch videos, with pen and paper, fully prepped to absorb what you're teaching and take action, all with the context of the larger course mission. The podcast feed is an easily accessible, low-pressure way to encounter your content, either for the first time, or fifth.