Who is N878HL? Registration shows Wells Fargo Finance Equipment but what does that mean? A vid on youtube said a military helicopter was behind it. It flies all over the place and doesn’t appear to have place of origin or frequent route. Also saw it fly over my house and its registration info on here said it landed an hour before I saw it overhead.
Williams-Sonoma is the operator according to the FAA registry.
By the way, the FAA has reformatted their web page for individual aircraft. Much easier to read.