This is just to address what things typically look like using my driving strategy. When the driver ahead isn’t a clover (or at least a first class clover) and uses his mirrors but makes a bit of an error or is just looking for someone to brake and let him in, he’ll decide not to make the lane change.
These two, because of the vehicles and when they decided to abort their lane changes show it clearly.
It is the exception when someone just pulls over anyway (as shown in other videos). Braking preemptively in both these instances would have likely been considered an invitation and they would have cut in regardless of space available turning it into a needless use of evasive action.