This man is clearly not doing this good deed just for show because the train is almost empty and no one is watching, except this one recording the video.
When he sees this seemingly homeless man without his shirt on, he didn’t hesitate to offer him something to wear which is obviously his very own clothes. He even came back few seconds later to give him more to keep him warm.
It’s easy to just watch this and say “Oh, he’s so kind. I hope everyone is like him”. But really, can we actually do this when we’re the one in this kind man’s situation? I hope so, too.