give access to certain page after payment

I’ve searched but can’t find it anywhere. I have a video site and i want to give access to the video the user selects not the whole site for example user sees a video thumbnail from video they want to watch when they click on payment method (paypal) and gives them access to that video and only that video (page or post). basically i want to give access to individual videos per payment not whole site like the other paypal plugins out there.