Interesting video. I learned from the comments that in the US, the maximum assisted speed for something to still be considered an "electric bicycle" is 28mph, ≃ 45kmh [0]. Bikes that can go this fast are actually not allowed on bike paths.

45kmh is a good amount less than the max speed the video quotes for his ebike at 60kmh, though of course that could be because he was riding downhill.

[0] https://himiwaybike.com/blogs/news/ebike-speed-limit-in-the-...