While learning about the differential signals I saw this youtube video. It looks like this slide does not correctly shows the voltage levels of the complementary differential signals, as I have marked in the following image.
My understanding is that the 'Blue' colored complementary signal should be -2V to 0V signal. So when we take the difference of the two signals (Black colored and Blue colored) then we get the original 'Single Ended Signal'. Please correct me if my understanding is wrong here.