The better shaila is if you are allowed to stream online without downloading. Meaning, is it even illegal?
It is vadai illegal for them to post it, since they are violating the provision against public displaying.
But, you are not publicly displaying, nor copying, nor anything which is illegal. So can you do it then?
So I saw somewhere that one federal court taina’ed that it is “copying” when your computer copies it in its RAM. That seems dochek, but it is possible that another court would agree that way.
But that really only answers whether you will end up being liable to pay. It doesn’t answer whether we should consider it b’etzem illegal now.