alt Hacker Newsi am in usa. rented few times here. both in apartment complexes and houses.
cheapest GE dishwasher that i found now - $349 heats water. of course, for video he could go and find some ancient dishwasher that doesn't heat water just to make a point (or maybe he has a broken one ? ), but i think it will be outlier today.
many (vast majority I've seen) have a heater, but won't heat the water sufficiently for the pre-wash cycle from cold. or, frequently, the second / wash cycle, unless you set it to a high temp mode, and even then it's questionable / often just a timer and not thermometer-based.
check your user manual. huge numbers of them tell you to run your nearby tap until it's hot before starting a cycle because of this exact reason. this is also part of the video, and it has been true for literally every washer I've lived with (I read essentially all manuals), including the "good" ones.