According to me, this is 2nd sitting coach. Most of passengers having regular/current tickets also travel by these coaches who are not allowed to enter in it. Because of this many a times wait listed passengers having reserved tickets won't get a seat.
In this video, Train Conductor has fined one young boy who is a student whose name on Identity card is not matching with his name in the reservation list. T.C. has fined him for it. Its not wrong also. According to Railway Rules, he has done correct job. But he hadn't controlled passengers with current tickets who entered reservation coach.
But...
more... most of times it gets very difficult to single T.C. to control these kinds of passengers in reservation coach. This mostly happens during weekends and holidays when more number of passengers travels. For this problem Railway should take some strict decisions.