Not a computer graphic and probably not an aircraft, but the lack of detail due to darkness makes this impossible to determine. Grade B. Thanks @IQXS
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The mystery of the menacing-appearing contrail that appeared 35 miles off Los Angeles on the evening of November 8 appears to have been solved: US Airways Flight 808 was approaching the Los Angeles area at the time, on its way from Honolulu to Phoenix. The plane would have been flying with a filed flight plan because it was in Grade-A airspace and flying under instrument flight rules. Despite that the flight plan would have been readily available, neither the FAA nor the Pentagon appeared able to identify the craft, and it took civilians to research flight schedules in order to make the determination of what it probably was.read more

This is a very good video. There is no evidence of tampering, and the object is clearly no ordinary aircraft, bird or other commonplace object. Thanks to Michael Lucking. Grade A.
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