I was using chromium.
The good news is that it works better with Firefox. The bad news is that it really grabs system resources -- like 10% of the CPU. I think this is because the "peering" part is actually working. Like 500 byte upload on FF compared to 50 byte on chromium.
Eventually, it finishes buffering (0 up/ 0 down) on FF.
You know, if I could just download the video it would probably take fewer resources.