I almost agreed with you (thanks for research). But....
At 4:03 you can see someone remove their hat. How to explain that? That's not from the wind.
EDIT: Nah, it's the wind. I saw it in HD. His hand doesn't move, and the wind gust is pretty strong from the way the flag is waving at that exact moment.
20mph winds with 28mph gusts for Biden's inauguration
No wind with 5mph gusts for Trump's inauguration
13mph winds with no gusts for Obama's second inauguration
I almost agreed with you (thanks for research). But....
At 4:03 you can see someone remove their hat. How to explain that? That's not from the wind.
EDIT: Nah, it's the wind. I saw it in HD. His hand doesn't move, and the wind gust is pretty strong from the way the flag is waving at that exact moment.