This is cool but let me tell you that this concept is nor new i have been using it since last 4months on my blog and create podcasts of every article i publish on my blog named wp hacked help. there are already ai tools for this which i use and are pretty advanced than this. Moreover we can embed that podcast on other platforms too.
You should add feature to this so anyone can convert article to podcast and embed them on their sites then it would be more useful. Anyways nice try but you are not the first dude. :-)
Anyone interested in that tool let me know i can provide you that. Infact iam thinkimg of creating a new post on hashnode listing all such ai tools.