This is a good case of people seeing what they want to see.
In the first collision, you could clearly see from the wake that the Japanese ship moved to block the path of the Chinese fishing boat first. The Chinese boat was moving at an extremely slow pace, probably to try and avoid a collision. But a ship is not like a car, you cannot break and come to a full stop just like that.
For the second collision, its impossible to tell from that footage who turned towards who.
The youtube clip also had ludicrous claims that the Chinese fishing boat was some kind of 'spy' boat. Which says all you need to know about the motives and agenda of the poster.
Its easy to completely change how an incident looks by simple selective showing of parts of the event. Unless an entirely unedited version is posted from start to finish, you can never be sure you have right context.
Besides, its simple to tell that the Japanese have nothing cut and dried, or else the Japanese government would have already released it when China was demanding the release of the captain to support their position.
In this case, how you view the incident is entirely down to the context. If you see this as international territory, what the Japanese done is entirely unacceptable (one can only imagine the BS reaction of the western media if Chinese patrol boats had done something similar to USN SOSUS spy boats gathering intelligence in China's EEZ). If this was in Japanese waters, then the Japanese would have a case that the Chinese boat should have stopped and submitted to inspection.
But the whole point is that China does not recognize Japanese ownership of the islands and surrounding waters, and so its captains will not behave as if they were in Japanese waters there.
This video changes nothing.