У вашего броузера проблема в совместимости с HTML5
Another Jovy RE-7500 video showing software manual mode operation. The bottom heater was set to Fast Reflow to ramp up the PCB temperature at a reasonable rate.
The top heater is the Elstein RFS80 (400W).
The performance of the Jovy is considerably better with the RFS80. The even heating characteristics of the RFS80 is in a class of its own.