They've stolen the property. It’s not “fair” if you replace it, let alone only replace it as “it was second hand”.
Original-price refund is both simple, and (by linking the time-value of money for both parties) fair.
1. Proration for a "lifetime" access (87 years) denied. In many cases probably close to 90% refunded.
2. irrespective, a Full refund for those who had never viewed the purchase.
3. A refund equal to the purchase price on the streaming platform newly acquired. Or a lifetime access (87 years) of the monthly billed streaming platform.