[karl262]

That RC glider is sweet!

On the Utah one I just think if you watch how it comes into view it seems to come from around the mountain ridge. And if that is the case then it seems it's possible to make some calculations (the deep dive video).
If the thing wasn't actually coming into view by flying from around the mountain then it's nothing but a seed or something going by the lens.

I like this case because the video quality they were originally captured is very high, it was a professional camera team shooting stock footage. Put it on a big screen if you can but still looks good on your phone. The story by my memory is later that day this stock footage team was having dinner at their hotel. One of them came down looking off after looking at what they shot and said he thinks they accidentally spotted something. This was in 2016, I don't know if they made any money off this.