So, the DVR service that is being sold here for an extra charge appears to be different from Sling's On Demand offering, as this purportedly includes the ability to fast forward as well as maintain access to content indefinitely, as long as you have "space" for it.



Neither of these are features included for all of Sling's On Demand channels. Additionally, some channels that do participate in Sling's On Demand offering are mentioned as distinctly not participating in the DVR feature, like Disney (for example).



So, I assume that's what the charge is for: Sling has to pay content providers to allow you to "store" content that you want to watch online, even though the content provider has decided to remove it from their On Demand offering.