This video might be a little bit confusing to some people. Dave never mentioned that clamping diodes (at least at the input) are standard in the majority of CMOS chips today (and in all chips we hobbyists are working with.)
We have now the situation to live with those diodes. There are no latch-up issues any longer, rather we have to avoid stressing those diodes.
I read from time to time here in this forum, that one assumes they could bear 1mA. That is not the case. It will do for pulses, but for permanent over- oder under-voltage (which is NOT an issue!) the limit should be designed to some 100uA.
E.g. for the notorious AC mains that would mean 1 MOhms , for 12 volts 47k to 100k and for things around 2 volts (the difference between 5 and 3) 10k to 22k.