Mt. Wilson Observatory Webcam - UFOs over L.A.- December 2010

From the description for the video: This webcam takes 1 picture every 2 minutes. The daytime one (at the beginning) was awesome. I want to know what the streaks are that show up at night. If it is due to a slow exposure/shutter speed on the camera then I would like to know why not ALL of the objects appear as streaks. Some appear as orbs/dots of light that move across the screen in succession to the time.

UFOs Live Webcam NYC - Dec 17, 2010

The video purports to show UFOs but if you visit the webcam's live feed here: http://wirednewyork.com/webcam3, you'll see that there's always lights in the sky which leads me to believe that they're planes, reflections, or something entirely mundane. Not UFOs.