A kitesurfing video may also be filmed in order to promote a certain school. As you may know, this sport requires a bit of training. Training lowers the risk of the sport considerably. These videos may attempt to promote the sport as well as direct you to a nearby school where you can learn how to kitesurf.
Then there are videos that attempt to teach you the basics of kitesurfing. The effectiveness of these videos varies. Some videos can actually be pretty helpful, considering the fact that one actually learns the sport by watching others. However, you might want to practice a bit before trying out moves you've learned through a video.
Some people enjoy watching the sport. There are certain kitesurfing videos which cover competitions. These videos often have some sort of commentary to help the viewer understand exactly what is going on. Of course, kitesurfing competitions are better viewed live, like in any other sport. However, if you want to relive certain moments in a contest, then this is the type of video for you.
The bottom line is that no matter what type of video you pick, you will be sure to enjoy it. However, if you truly want to get the most out of kitesurfing, you might want to go beyond the visual and actually try the sport.
This will help you understand the whole culture behind it more than videos will. Actually, some people might say trying out the sport will give you more entertainment value than videos will.