This is the official RU-vid channel featuring railways from all over Japan. It was established on October 14th, 2012. There will be new clips uploaded weekly. This channel is operated by Vicom Inc, which is the largest producer of rail-related Blu-ray and DVD videos in Japan.
1:48 I can notice the headlamp getting dimmer from a decent amount of current drawn by the motors. Maybe, that was why the trains here accelerated so slowly as to not overload the weak traction substation