Yes, ich_iel mostly just takes English words and translates them 1:1. Doesn’t actually make sense in German, but that’s part of the joke. If you translate it back to English 1:1 again you should understand it perfectly.
As a native German speaker I often had to translate ich_iel memes 1:1 to English first to understand them myself. Its basically English but in German.
Well in cinemas I’m obviously silent because there are strangers. I just like to talk when watching movies together privatly.
I think its really nice when the movie is a total brainfuck to make theorys with friends. If you just want to sit there in total silence even in private situations you could just watch the movie alone.