Telemark, thanks for the answer. It could be that type of thing but just looking at that one it seems rather too big.
One thing I did notice about the bike itself was that the rear tyre was really wide- more like you’d see on a sedan. I don’t know if there is a clue in there (I am no biker as you can tell).
Just one thing also- the mounting for that camera is a lot more substantial than that I saw. As I mentioned, it was more or less mounted on a stalk thing.
There are many different cameras and many different mounts, GoPro just happens to be one of the most popular models. A lot of folks take helmet videos, I’m still guessing it’s one version of that.