The NBA and NHL are both leagues that make a major part of their annual revenues through playoffs. Lots of packed stadiums, higher ticket prices, more sports paraphernalia, more air-time, and so on.
Accordingly, they are both pondering whether holding playoffs - assuming standings as they were frozen when the restrictions came it - with only video access would be economically feasible. Could they get away with pay-per-view? Would sponsors pony up for adequate fees? Would the players expect (demand) to get paid for a full season? Could the players be made "safe"? Would those who care accept these championships as legitimate?
None of this is easy. The Owners are rich bastards, but not infinitely rich, and not economically stupid.
On the other hand, would the Owners seek to use this as a means of forcing Revenue Sharing and in effect salary caps?