4 lights appearing in and out of Rancho Cucamonga, CA

I was coming down from a hike off the Etiwanda Preserve Trail in Rancho Cucamonga.  My boyfriend first noticed the lights in the sky and it was odd that they weren't moving.  They didn't have the same lights that you would see on a helicopter and plane.   
We saw planes coming in from a different direction as there is a airport near by.  However, unlike the airplanes, there was no movement, no change in size, and they would appear and disappear at the exact same location they had been originally.  
The more we watched I noticed another light off in the distance doing the same thing.  The lights also didn't twinkle the same way as the lights in the city below did, they definitely had.  They seemed to have a more unstable light and more of pulsing light from them.  I would see them appear and disappear and not change location.  
As they disappeared the light became more faint and pulsed more.  
As we got in our car and went closer to the bottom of the mountain we noticed that! we were too low to see them (we originally knew they were low because we saw helicopters fly under them).  
Here are a couple videos I recorded:
https://www.youtube.com/watch?v=ii6tTpMt01s https://www.youtube.com/watch?v=d2L-RCHI40M