У вашего броузера проблема в совместимости с HTML5
I recorded from 33000-40000 then I took a break, when I returned I missed a step on the third song so my total combo was right around 41000 steps in a row. I mis-stepped but it was a SOLID RUN, almost four full days without missing a single step. Also got a 5 Perfect score on a song on video.