KM player is a very popular and good video player for pc. This player has some awesome features so I use this player most of the times.
It has thumbnail preview and it is very useful for watching videos. And the seeking is very easy in this player, pressing right arrow key to seek forward and left arrow to seek back. It has a 3D option so than any video can be watch in 3D with 3D glass, it is the best option in this player.