Your interpretation and mine differ .. calling someone a liar because you disagree doesnt seems like a particularly constructive argument. You interpret "not on city streets" to mean "TACC can be used anywhere other than city streets" I interpret it to mean "definitely not on city streets, among other non-highway and/or divided road examples".You keep saying that TACC is not intended for the use in the video, and that is a flat out lie. To quote the owners manual "Traffic-Aware Cruise Control is primarily intended for driving on dry, straight roads such as highways and freeways. It should not be use on city streets."
The road in the video is a dry, straight, rural highway... it is not a city street.
You know that on non-divided highways and city streets TACC limits you to 5 mph over the speed limit, and on limited access freeways it places no limit on how much you can exceed the speed limit don't you? That means that the car knows when you are on a limited access freeway and when you are not on a limited access freeway. If Tesla did not want us to use TACC on anything other than limited access freeways they could disable it instead of limiting the speed to 5 mph over the speed limit... but to reiterate what I quoted above from the owners manual, they expect you to use TACC on anything other than wet roads, curvy roads or city streets.
I've (carefully) driven the car on TACC (with and without autosteer) on various roads where I felt I was pushing the limits of the definition: small two-lane roads with the usual mix of straight sections and some bends of varying degree. And yes, I had the car do a few dubious things. Did I then get disgusted with Tesla and rant that the car didn't do what I want? No, I put it down to my pushing the car beyond its design limits. My interpretation of the OP video is that it falls in that category (in parts). You (and the OP) may interpret it differently, as is your right to do. But it doesnt automatically mean your interpretation is correct.
And your argument about what Tesla could do is bogus, since it assumes there are only two categories of roads: freeways and non-freeways, which is nonsense. Yes, there are freeways where the car can relax its speed limit restrictions (and potentially engage NoA, which is really what this category of road means). But the category "non-freeway" includes two types of roads: those suitable for TACC and those not suitable. So the issue of speed limiting is irrelevant, since it does not define where TACC can/cannot be used.
What Tesla are basically saying is "We expect you, the driver, to use TACC responsibly and carefully, especially when on non-freeways, and be judicious about when the road itself and prevailing conditions make TACC a safe option." Why do you think this is bad?