Its minimalist interface will surprise you at the right moment you runt it. I fact you'll only have two options: Load a Youtube video or Play a video stored in your HD.
If you choose the first option, you'll access a new window to surf Youtube, if you choose the second one, you'll access the file browser to select the video you want to play.
Once you'll have decided, you'll just a few controls, such as play, forward and review. That's all. Simplicity is its basis and it offers good video quality and low resource consumption, so it is quite good.
VAF Player is as easy to use as interesting and if you usually view Youtube videos it can be pretty useful.