Some people are late to everything. Although, it’s surprising to hear any Germans might be late, maybe they are immigrants or tourists? ~
I have to say, I run late a lot in general, but I’ve probably arrived late to the cinema only once or twice in my life. I “always” make it there before the movie starts, usually before the trailers start.
The only time I walk into a movie when it has already started is if I was watching a different flick and go into another one after the first is over. I rarely do it, but if there is a comedy, or something easy to understand if I walk in late, I have done it. For the movie goers watching that movie I guess it seems like I arrived very late for the movie. If it’s very crowded in that theatre I don’t try to squeeze in though. I wouldn’t want to be disruptive or impinge on other people’s confort who have already situated themselves. I only do it if there is lots of room and I can quickly take a space on an aisle.