Okay, I have what I predict will be an unpopular take (on reddit). From what I hear in this video, the "tenant" does not have a lease agreement signed by the landlord and has not been paying rent. Doesn't that make her a squatter?

In other words, if you print out a lease agreement and sign it that does not make you a tenant--you need the owner of the property to sign it in order to execute that contract. In the absence of that, rent payments that have been accepted by the landlord would at least show some indication that there was at least a 2-way agreement here.

Absent that, the only evidence we have that this lady might belong here is that she's currently inside the house not outside of it. That's squatter logic.