That would be a relic from a previous film. Because the films have an overlay containing additional information, I tend to create a new film from an existing one. I delete all the audio and film footage, leaving the overlays. I then add new audio and film and edit the overlay to match the new content.
Sometimes I miss one. This is why you will occasionally find a heading for a Paps Supermarket in the middle of a field!
In this case, I used the Maximos Ranch film as the base. "Bottom Gate" was referring to the gate at the bottom of the Maximos Ranch drive.
Unfortunately, to remove a mistake once the film has been uploaded to youtube is a monumental pain. The films are each over 10Gb in size, and having to upload that again takes a long time. Also, you cannot replace a film of youtube with another. You have to create a new one and delete the old one.
If its any consolation, I have a separate channel that I use for films of the computer games I play with my daughter. Those films tend to be anything up to an hour long. I am fairly confident that nobody actually watches them, so I occasionally replace the audio commentary with something completely different.
Jump forward to the 42nd minute.
https://www.youtube.com/watch?v=U4Tyc5l6PhA
This is how we keep ourselves entertained during COVID! Mind you, we do argue a lot as well.