I saw the same video on an Indian web site and had the same thoughts.
Those guys are totally nuts.
The amazing thing wasn't the speed the RE Twin was running.
The amazing thing is that both riders survived.
IMO, riding that much faster than the traffic around them is just plain stupid.
Especially when rider with the helmet cam spent over 20 seconds, several times, looking at his speedometer and not at the road.
I saw speeds of 130-150+ kmph. That's 81- 93 mph.
(For those interested, at 80 mph, the bike would have covered 1320 feet (1/4 mile) in those 20 seconds he spent trying to get a video shot of the speedometer.)