There are three main categories for over-the-top media services. The first one being the most common. Subscription-based services include on-demand streaming content such as Netflix, Hulu, Amazon Prime video, etc. as well as the live television providers such as DirectTV NOW and Sling TV.The second form of over-the-top media is actually free. That's called free and ad-supported services. The most notable of these free services is Crackle, but there are many others.Lastly, we have the Transactional services. These are services such as Vimeo, iTunes, GooglePlay etc. where you make one-time purchases over-the-top to either rent or buy your media. You select individual pieces of film or television instead of subscribing.