I think only one person is involved in this. I'd love to hear what other people think, based on the video alone.
If you watch the video over and over and over and focus on one thing, then watch over and over and over to focus on something else, soon things start to become detectable.
For one, it's definitely a white person driving, you can see their hand, arm and face color. Keep trying, soon you see what seems a mop of hair, very light.
Keep rewatching, there is no one else in the SUV.
Look at the wheels. Fat, aftermarket rims and wide tires.
And so on. The SUV is very distinctive, the driver is detectable.
What features can you guys make out when you watch the video?
Also, who's car is already in the driveway when the SUV pulls up?
http://losangeles.cbslocal.com/2017/01/31/valencia-man-disappears-under-bizarre-circumstances/