People went to see Potus just don't leave. They wait until he is finished speaking.
And they walked in a massive crowd. Ever walk in a massive crowd. It takes forever to get anywhere.
Potus intentionally delayed his speech to counter their planned insurrection.
These morons gave the signal at the Capitol
Look for the flare.
It was cold and windy. Doesn't negate the fact the distance between the two points plus the crowd. 45 minutes at least.
Right after trump stepped off stage the Capitol was already being "stormed" by faketriots.