The main thing about stream trivia is that speed often matters more than accuracy. The organizers see that the first answers come in simultaneously from hundreds of viewers, and that's completely normal - some will be wrong, some will match up. The key is just that you write something instead of sitting there worrying. The chat moves so fast that your wrong message will disappear in two seconds, and nobody's going to remember it. Even the moderators don't track individual incorrect answers.
If you know the answer - write it, even if you're not 100% sure. I once participated in a history stream, the question was about some date, I wrote a year but then realized I was off by one. Absolutely nobody noticed or commented on it. But when I did get a more difficult question right before everyone else, the moderator didn't even call out my answer specifically - just counted it as one of many correct ones.
The unwritten rules are simple: don't spam the same thing over and over, don't write insults, and obvious trolls aren't welcome, but everything else is fair game. If the question's about movies and you don't know, you can throw in a joke instead of an actual answer - people appreciate that. And here's the thing: answers like the ones you wrote above are totally fine - nobody's going to judge you. A ton of wrong answers in the chat is just the normal state of any trivia.