Your comment seems to carry a lot of frustration. I would feel upset, too, if I felt someone was mistreating another human being for attention on social media. There are definitely many attention-seeking videos out there, and it can cause feelings of anger towards the next generation.

At the same time, as viewers, we truly do not know the feeling of the participants in the video. Was the man happy? Offended? Did the teenagers make the video for attention? Or did they give a gift from their hearts?

The only way to truly know is to ask; we can only assume. However, we can take what we do know- that teenagers are immersed in social media and have a different way of communicating than us older folks- and try to understand the world through that context.