I have to say, the kid raises some relevant points, but he really needs to work on his people skills.
Be that as it may, the unfortunate thing is that, perhaps due to some skewed sense of propriety, a lot of Singaporeans actually agree with the arrest, rather than seeing the video as food for thought at best or an ignore worthy adolescent rant at the worst.
I don't know enough "facts" to speak to the matter at hand, but I'm really impressed with the rhetorical sophistication of this kid. Sure there is not much content, and it's a bit puerile, but the execution is fantastic.