If you look at more than just the clip, in the play before, the green player is seen hustling at full speed up the ice where as the other player in white (orange icon) has a few moments where he can be seen not in a hustle animation. You can also see his stamina in the green at one point showing that he is above that threshold. This in combination with the play after leads me to believe that the green player is drained on stamina while the other player in white has at least some left in the tank. When any player reaches either 75% or 66% stamina (can't remember which but I think its yellow bar), their max speed starts to diminish. At what rate I am unsure of and there is, to my knowledge, no place where this information is mentioned.