У вашего броузера проблема в совместимости с HTML5
A video demonstrating the Crit-a-Cola.
https://wiki.teamfortress.com/wiki/Crit-a-Cola
Function times (in seconds)
Effect: Each attack under the effect gives mini-crits. Attacking marks the player for death for 5 seconds after the effect expires.
Consumption time: 1.2 s
Recharge time: 22 s
Effect duration: 8 s
This is part of an ongoing weapon demonstration project.
Help us out! Learn more at: http://wiki.teamfortress.com/wiki/Team_Fortress_Wiki:Weapon_Demonstration