Stop looking at the soldiers, the key are the cyphers. Shoot a barrel when the both of the cyphers are more-or-less in-between the barrels, so, blowing up one barrel blows up all of them, thanks to exploding cyphers.
position your snipe in between the 1st barrel and the 2nd barrel from the left, then just shoot it once there's an unmanned weapon fly-by. it will explode and detonate all the oil barrels and everything will be blast away
48 seconds can't be the right number as both UAV's are no-where near each other or the barrels. The closest they ever get to each other is 45.5 seconds. At the .5 second mark, the UAV on the left starts to head further left while the UAV on the right starts to come toward the middle. No matter how fast I click, I get every soldier + 1 UAV and always fail to snag the other UAV.
Had commercials? what like asian fujitsu air conditioner ads or sumthing? -ChaosCloud
4:13 is where you want to fire the Middle Barrel you have to judge when both Kidnappers are on both sides of the middle barrel, it might be a little after 4:13 but its usually around there you have to fire the shot.