On-demand subscriptions can give customers access to:
Collections (which contain videos and pdfs) and
Courses (which contain videos, pdfs, or quizes)
We'll focus on the Collections aspect here (so videos only). You have 3 options to offer access to on-demand videos:
A collection on its own. This can be rented out on a per video basis.
An on-demand subscription. This can give access to an entire collection for a monthly recurring charge
A regular subscription that includes access to either:
all existing video collections; or
an on-demand subscription that holds 1 or more of those collections.
This last option allows customers to purchase one subscription that gives them access to all types of events, appointments and on-demand content in one fell swoop.