This was a long time ago. Furthermore, this is part 1 of 2 videos of this homeless man receiving something from this guy. Part 1 was for subs, he didn't do it out of the heart. He simply wanted more subscribers. Part 2 was from the heart of the viewers. The YouTuber took it most likely as an attempt for even more subs since he was the median, the bridge from the viewers to the homeless man.
Cheers to the homeless man, but the YouTuber is just an attention ***** in my opinion.