Heres the deal. I'm assuming its the game you played scout as. Considering the rest of your team, you needed a bfury. You push both sidelanes while your allies stall middle. When the enemy is ready to engage you or mid, you move to another lane or mid. Keep pushing sidelanes so your team gets gold advantage as opposed to the gold gain being even (they had some carries as well)
The second you push both side lanes to base towers, keep stalling, farm their jungle, and push a side lane a bit to pressure them away from mid. The second one of the base raxxes goes down your team gets entry into their base and you win the game.
You'd pressure the side lanes, the fear of having a behemoth on your team prevents theirs from going out.
Their team had 3 carries. Forcing them into a single lane would grant your team a huge advantage. If you push both side lanes to reach raxxes at the same time, it means that they have to sac a rax or leave mid to be a 4v3-4 situation. (this is assuming your team had map control as opposed to theirs)
Other things you couldve done: get kongor, farm the entire map w/ pushing sidelanes while making your team stall mid, etc.