All this is about is awareness: There are people with certain problems that can easily be helped with measures which aren't that hard to implement. And, yes, sign language translation would have been preferable. Translating into all languages wouldn't be feasible for a small organization, though (see the pragmatism in discerning between a few easy steps to make people's lives much more bearable vs. unreasonable resource spending?).

You then go on to spin out convoluted points about the waste of "life resources" by using this simple example of people trying to be more considerate of other people's needs, and that's what's really defining this video.

And, yes, we know a lot more today than the people who lived during the age of enlightenment hundreds of years ago. You talk about spending energy on building a better world, but the way we treat each other, being considerate with each other, doesn't seem to be worth spending energy on for you.

Here's a suggestion: As you admit, you don't know much about sensory overload. So, perhaps you shouldn't be out and about suggesting how it should be dealt with, and that "being exposed to it" is supposedly a good way to deal with it. People with sensory overload are also not being "offended" by loud noises, they lack the ability to properly deal with them. It's not an optional reaction that somehow filters loud noise through their value system or considers it a personal attack, and then deems it inappropriate or something of the sort.

You know why you see considerations of that sort a lot on the left? It has nothing to do with economic systems or anything else of that kind: It has something to do with people on the left wing caring about other people, the notion that mutuality, solidarity are good ideas.

It's also not about free speech, it's about mode of operation (don't waltz over other people): Just like you'd probably agree that shouting down the speaker is bad form, the people in the video consider unnecessary loud noises bad form. You simply happen to choose one kind of bad form as good, and throw convoluted criticism at the other.

Lastly, I take that you think "true capitalism" would fix the oligarchy problem, but here's something to consider: Resources concentrate because people attempt to do so, and have done so for all of recorded history. I argue that de-organizing society is just likely to exacerbate the problem, not fix it. Especially with the predominant culture of infinite egoism so prevalent in today's world.