This sideline out of bounds play starts with a ‘wall’ of three players on the free throw lane line. It creates a couple of possible scoring options.
When the official hands the basketball to O1, he passes it inbounds to O2. O2 must be able to get open on his own if he is tightly guarded (V-cut, L-cut, post-up, etc).
After passing the ball inbounds, O1 cuts down toward the wall. He has the choice to cut on the high side or low side of the wall. This choice will ultimately depend on what his defender does. If the defender cheats high, O1 can cut low .. and vice versa. Also, if the defender cheats over the wall, O1 can even flare back out to the ballside corner.
The second option is that O2 will look for O5, who is using a screen set by the middle player in the wall, O4.