What happens if you add content and set Require Access but then disable all the pricing options? The video is essentially private. Customers would see the videos on the catalog page but clicking them would not allow them to purchase those videos.
You can grant access to these videos by adding them to a bundle and making that bundle only accessible by link.
It's probably best that for whatever category these videos belong to, you put that category at the bottom of your catalog so it doesn't get in the way of content that the majority of your customers do have access to.