At the begining of the video, Travis yells "Contact" to signal ennemy presence and rushes to cover, whilst sending lead towards the target. Chris joins in immediately, and asks for cover fire when he says "Moving". Travis replies "Move" to confirm he understood the request and promptly delivers rapid cover fire.
Chris then moves carefully behind Travis' gun, tapping him on the shoulder as he goes by to confirm his departure, and runs to the next available cover in direction of the ennemy. As soon as he is in position to shoot and provide cover, Travis joins him.
Then, Chris shoots "reloading" to signal he is out of amo. Travis replies "check" to confirm he understood the request and provides cover fire while his teammate performs a speed reload. When done, Chris says "ready" to signal he is back in the fight. Once Chris' gun is fed with a full magazine, Travic can now move forwards, knowing his buddy will be able to cover him.
This sequence perfectly illustrates how a team of only two members can use a simple communication system under stress to keep every one informed and moving forwards until the threat is neutralised.
Fast and Accurate Execution
Once a contact has been identified, the spotter has to clearly indicate where ennemy fire is comming from. This allows the team to take cover to avoid incoming fire and counter-attack.
From experience, the team with the fastest and most agressive members in terms of fire power delivery quickly gets the upperhand. The trick to reverse the situation is to respond to the stress of incoming fire by getting into a mental state where you decide to go get the ennemy and attack them with all you've got.
This is where all your good shooting techniques and reflexes kick in after countless drills, allowing you to efficiently deliver accurate rounds onto the ennemy position. Whilst their heads are down, your team mates can move and get to cover.
However, if you are too slow in your execution, the ennemy will pin you down first and flank you. Morevover, if your shots are too innacurate, the ennemies wil quickly notice and dare take pot shots at your running team mates to out them when most vulnerable. That is why the team has to constantly lay down cover fire until the ennemy is down or fleeing.
This is why most drills should focus on momentum. The team has to keep moving forwards and simply use heavier cover fire when moving into more open terrain. The momentum should be kept strong with communication and fast movement to avoid a long lasting engagement with the ennemy.
If your team becomes pinned down or locked into a fixed position, then it is urgent to plan a slight retreat, luring the ennemy into a trap or position where they will have less cover andthen re-launch a new attack momentum to break their will to fight you.