I am from the area near Hospital #2 in Mariupol. Our house is shown burning in the opening shot of Day 16 on the movie.
The movie, although tough to watch, is sanitized. The truth of what RuZZians did in Mariupol is even worse than we see here. They destroyed an entire city of half a million people, then intentionally starved any survivors.
If you claim to have an opinion about Ukraine, either watch this movie or keep your mouth shut.