Holy shit!!!! YES, this is EXACTLY the kind of thing I was told!!! I was told it was the computer listening, but of course, the phones can also, so YES, this is EXACTLY it. And that story is obviously NOT a coincidence as how likely is it that someone would get an ad on YT about such a unique experience? (for those who haven't clicked on the link the OP tells of an experience where he is fixing a garage door and then goes inside and looks at You Tube where a video pops up about....FIXING YOUR GARAGE DOOR. He realized that the Google phone in his pocket had been listening to him in the garage!!!!)

This is EXACTLY what I'm talking about. Thank you so much for posting this. My source will be glad to hear that others are having this really bizarre experience!