In episode 4 of the History Channel's show "The Secret of Skinwalker Ranch" the team of people make a big deal of what looks just like a plane.
Two objects are visible in the sky. One is a plane leaving a contrail, the other is what looks like a plane not leaving a contrail - which usually indicates it's at a different altitude. Both planes look like they are quite far away (like 20 miles at least)
From shots of the cast watching the plane, we see the sun is low in the sky, and they are looking towards the South West. The building behind them is oriented due north (i.e. the wall behind them runs north-south)
This means the plane with the contrail is flying away from them roughly towards the west.
One cast member, Erik Bard, then goes into the ranch's control room to check for planes.
He seemingly does not use a commercial service like FlightRadar24. Instead they have their own ADS-B receiver.
He says "there's no object on the radar showing up next to that plane" - which means he's identified the plane leaving the contrail. What's on screen is:
N519AS, ASA9340, 33000 feet.
So when was this? Later they show some playback with this time in the corner:
Then later they show an audio file from the rocket launch that gives a more precise time and date:
And the filming time is the night of the same day, as seen on a status monitor
The time zone is MDT. 18:50 MDT is 00:50 UTC the next day, so 2019-08-28
So one problem here is the flight that is shown, AS9340, only flew using the plane with registration N519AS on one day that month, Aug 22, 2019
when it was over the ranch at 18:57 UTC, or 12:37 AM local time. Different day, and a different time.
It's also only 3 miles away, which would have been near overhead at the time they were looking at it, and due south.
Assume for a second that AS9340 on Aug 22 2019 was the actual plane leaving the contrail (even though that seems to contradict the other dates shown, but we can blame editing), then was it the only plane in the sky? If we go back to around that time we see two far better candidates flying in tandem
If THIS was the right scenario, then AAL109 (a 777) would have been leaving a trail, and DLH456 (a 747) would have been the shiny object. This all seems unlikely, as this was around noon, and the footage seems later in the day. The reaction shots are entirely consistent with a time of 18:50 MDT (UTC-6), when the sun would have been a bit north of west.
So, if it's actually 18:50 MDT on Aug 27, ( 00:50 UTC the next day, so 2019-08-28), then what are they seeing? Maybe one of these?
Just south of the ranch that day was the main approach to Salt Lake City, Several planes were flying in, and it's quite possible that two of them were two of those seen on screen aboe. However, it's impossible to be sure without knowing the exact time. But viewed from the ranch, looking West, the flight paths look consistent with the contrail (which is normally several degrees off the flight path due to wind)
What we do know, however, is that the scene where Erik Bard claims to not be able to find the second plane is a fabrication on the part of the producers. It's a different day.