While I don't think it's aliens :mrgreen: , it wouldn't surprise me if China or North Korea snuck within miles of our border and touched off a missile. Hopefully not, but I just can't believe it's an airplane.
Right at 0:38 seconds you can clearly see the rocket exhaust. I have seen sunlight glint off the bottom of an airliner before, but not that intensely. Nor have I ever seen a jet contrail spread out like this plume did.
Plausible deniability - there is a weapons range in the Pacific Ocean West of LA, and "Civilian" contractors may be testing there at times. The military has a STANDARD policy of denial of any knowledge of anything connected to such secret missile testing.