У вашего броузера проблема в совместимости с HTML5
I was at a local Bikesafe event recently and the police rider let me film his demonstration ride.
This is a serving Class 1 police rider demonstrating good positioning principles. Thought I'd upload it as I have found videos like this useful myself.
I have been given permission to publish this.
The ride started from the Police HQ in Wymondham, Norfolk.
His Bike: FJR1300 adapted for police use.
My Bike: V-Strom 650