How Do I Change DAP Back-end To MarketPlace For a Video Site?

The challenge that I'm running into is that the digital product is Not a Download, But a series of online videos hosted on the amazon S3 Account. The Website itself is

Currently its Running a DAP membership plugin, which to say the leas is very lacking... So I'm switching to Marketplace.

So how do I sell the Video Courses and give Only People that have paid access to the training?

I sincerely appreciate your prompt response and help :slight_smile:

Amore Pacis et Lucis,