The Yosemite valley is a very special place, especially to climbers, geologists and photographers, of which I am all three (with varying degrees of ability). The valley was the first national park and represent a step change in our perception of wilderness from something to be exploited to something that should be cherished and preserved.
A couple of nice videos from the valley. First is a fantastic timelapse, one of the nicest I have ever seen.
Second is a nice bouldering video