Not in my house.
They don't need a warrent to do that.
Most of us usually don't think of a call to the police for help as something that needs a warrant ~ but let's say the cop goes into your garage, on that call, and your ex-husband is in there smoking marijuana! ZOOT ALORS
Does the cop need a warrant to see the marijuana? Does he need a warrant to go into defensive stance when you start screaming "It's my husband he's evil".
Now if you come home and can't get in the door because a cop has stopped by to smoke your marijuana and laugh at you from the kitchen window as you scream frantically? He probably needed a warrant! Even if he's toking up with your ex-husband.
Not to ridicule the situation, but we do not know from the video(s) whether or not those people were voluntarily allowing the cops in their homes, nor why the cops have them stepping outside. I suspect it's something like when you come home and find a dead body in the bedroom ~