obviously twitch chat is not an actual hivemind, so in terms of reality-as-is, no, it's not like, a grammar textbook pronoun. but i think the word as is explores a developing liminal, parasocial, space in how we speak about feeling like someone is listening
and, of course, because hiveminds in science fiction have to resemble our known rules of language so we can understand it, it just borrows first-person-plural and third-person-object even though it's not really?? like, a group agreeing?? or an insentient object
so like, we-us-it/them to refer is used in fiction to represent hiveminds and people do suggest that it's fourth person because it blends the boundary between personal and collective, however obviously since it's not real, it's just kind of like, a stretch
however, the word "chat" not only invokes the group of "chatters" as a grammatical object, but treats them as a singular hivemind, and not only that, it's--by virtue of a streamer's relationship to their chat--a direct address like the second person plural "you"
not only that, "chat" is often used by a member speaking IN the chat to refer to the collective, sans self. for example, if one twitch viewer types in the chat, "chat is going crazy rn," they're performing like, a half-detachment from the collective to observe-self-estranged
because of this, "chat" as used by: streamers to refer to not a selection of viewers or the whole of them, but rather like, the ambiguous general nascent spirit behind viewership, as well as "chat" used by viewers of the streamer to refer to themselves--sans them, is unique
up until now we've only ever imagined how people would interact with a hivemind and how a hivemind would interact with people and other components of itself sans itself.
and then it just happened and we made a completely intuitive pronoun for it and we just didn't even realize we solved a trivia problem that creative writing professors have been agonizing over for decades
if you, as for an example a streamer, were talking to someone else in your voice chat who is not part of chat but, rather, a co-streamer, wanted to tell your conversation partner about what your audience said, you would say "chat told me you were wrong": y'all wouldn't work here.
a good counterargument is that when people talk about chat, they use "they" to refer to the group, rather than just "chat," like "chat told me they don't like you." this would make it both a noun and versatile turn of phrase rather than like, a dedicated pronoun
it should be said for people who aren't in the know: the reason i say it might become a pronoun and not a noun is that gen z are using "chat" while not streaming/watching a stream in a mostly joking way but it makes SENSE because its referring to the sum of "whoever can reply"
@angeIsighting
Chat is an inefficient hive mind. The majority of them share the same opinions or goals, though communicated through the text chat instead of a connected mind.