The questions aren't really meant to be answered if you're a self respecting person but the video is meant for you to look within yourself and say "wow, it's not okay that black people are treated this way". Essentially the video is supposed to make you feel black for five seconds. Notice how angry people get at that idea.
I don't see people getting angry over that idea, but over the people mocking them when they don't get it correctly.
You say "The questions aren't really meant to be answered if you're a self respecting person" and that is essentially shitting anyone who answered the questions thinking it was a direct, honest communication. Instead of dealing with questions in a fully dismissive sense, they actually answered them, so they are told they "did it wrong" somehow.
Supposedly, they were supposed to think "so this is what it is like" and simply feel it, and respond to such inane questioning in exactly the same way that black people have taken to dealing with it after an entire lifetime of being bothered with such inane questioning every day.
Naturally, they aren't going to. Their impulses toward that sort of thing are going to be different if they haven't lived a life of it. Telling them their impulses to actually answer the questions are
incorrect because they are not the same is silly, but then to try and shame them for not getting some lesson in empathy is even more silly if the communication was clearly failing at it's intent of establishing the same feeling minorities get.
When you do that, it it likewise silly to expect them to go back and try to experience it again with the right attitude. They are instead going to be focused on the fact it completely failed at doing what it intended to do, and they will (in trying to maintain understanding and rationality) explain that this was due to their interpretation of it going in due to the way it presented itself, and the importance of clear communications.
If you then take that as them being judgmental about how minorities are "allowed" to express their frustration, you have missed the point entirely. They aren't offended, they are explaining a broken method of communication. If they had to be told after the fact, it failed, and the "being told" was more effective, so it could have simply started with that and done better.
Yeah, if you said "hey, look at this video that tries to show you the kind of shit you get when you're black" it wouldn't hold the same out-of-the-blue effect, but if people don't deal with it everyday they will take it as a one-time occurrence that should be responded to in a direct manner. They aren't going to imagine "what if this was every day?" and understand, because the context of was was trying to be accomplished was misleading.