Rotate video with VLC Player (Portable)

I started realizing that rotate video on KMPlayer doesn't work well on my MacMini (Late 2009).  Fortunately, I always have a plan B, and this time the plan B is VLC Player. To rotate a video, just select menu [Tools] [Effects and Filters].  Under the tab "video effects", you will find the "Transfrom" check box.  Click it to turn it on and then select the rotation you like.  Sometimes, though, you need to uncheck and check the "Tranfrom" checkbox again in order to see the effect.

By the way, VLC also has other funky but sometimes very useful feature like Crop and so on.