Exploring YouTube for Newsletter Content: Idea Feedback Needed

Has anyone here thought about starting a YouTube channel where videos are on the same content that you send out in your newsletters? One of my friends is thinking whether to create this as a service for newsletter operators. He runs several YT channels 500k+ subs etc, has his own video team and systems, they write scripts and narrate themselves etc. I even worked with them on something so I know it’s quality operations. He has an idea of offering newsletter writers a service where they’ll create a brand on Youtube to go along the creator’s newsletter, and the content would come from the newsletters. So they handle all the admin + thumbnails + script + video roll + editing + grow the channel etc, the writer would just have whatever input they want to add. I’m thinking of partnering them on this for my EVwire site as well since I don’t have the time to do Youtube but I bet it’d be good. He’s looking for feedback on the idea - what do you think of this?