the powers that be are aware of this
Yes, you need to close the channel and re-open it to "get around" the time limit. It's a pain but doable. (It would be nice if they added a bit more time, though.) There are several reasons for enacting this policy. If people fall asleep while watching, this conserves bandwidth, or If someone hijacks the stream, the most they will get is a 2 hour window. The token would expire at that point, so they couldn't distribute the stolen stream to others.