I've sometimes seen several at a time at night when walking the dogs. When I get home I look them up to identify what they were. Depending on where the sun is below the horizon and how clear the sky is, some nights it's almost impossible to not casually spot at least one, and other nights there are so many it's quite surprising.
ISS always really stands out because it is relatively close and is much larger than other satellites.
When you see more than one travelling in the same direction, they're nearly always a "train" which is basically what you get when they release a bunch of new satellites but they aren't in position yet. And if you're lucky, you can catch various units "chasing" the ISS with supplies.
That doesn't explain the other two links, though. They are more connected to what people wanted from the report.
But seriously, the Slattery videos in that first linked playlist are all satellites? I don't think so. Can you share a video of satellites to compare? You can clearly see trees in some and the size of this "ISS" is huge. And it's at daytime. I've never seen a bright white orb flying past at daytime.
I think maybe the faraway small ones at night could be satellites, but daytime large ones? Not a chance.
Take a look at this:
Are you still going to say that's a satellite or ISS? :)
Auzzie guy, Peter Maxwell Slattery: https://www.youtube.com/watch?v=jFgOkz_l9Vs&list=PLvfydYBDG4...
Italian guy, Antonio Urzi: https://www.youtube.com/channel/UCZx6b7Efwu9DbhYs4E89B7Q
Amicizia "Friendship" UFO case Italy 1960s: https://www.google.com/search?q=amicizia+ufo+footage&tbm=isc...