Today's drivers unsure about which left is right

Which way is left? This left or my other left? Your left or my left? Which left is right or which right is left. Is it right? I don't know. Anyways, here is dashcam video of 3 drivers who probably can't tell there right elbow from there left toe. They seemed to be indecisive in their driving behavior. They put their turn signal on only to turn it off or immediately change directions. One driver even signals to go right but then actually turns left. This could actually be bad for others on the road if this behavior is common. Other drivers depend on these important signals to make adjustments to their own driving as required. Drivers under estimate the power of turn signals.
They are important for letting others know the direction a car wants to go. Switching lanes, turning into driveways, businesses or streets, a turn signal allows others to help know what they should be doing with their own car. They can be seen as the only non verbal predictor of where a car wants to go. But that only works when it is used correctly. If I use my turn signal, I am letting others know my desired path. A driver should not start to turn and then signal. The signaling has to happen before the desired action.
A major accident is always possible if signal use is incorrect. A driver noted that he once witnessed an accident when someone had their right turn signal on to take a right onto a side street. So the other vehicles assumed it was safe to pull out but the signaling car did not turn right. He kept going straight and T-boned the car pulling out. The car pulling out probably should have waited until the signaling car actually starting to turn before he pulled out but either way, this was improper use of a turn signal.