Beautiful scenery! Your a credit to the hobby, Braving the snow to activate the summit deserves a definite "WELL DONE!!"
It is very interesting that you got a bunch in Seattle and then the midwest. Not sure what way your antenna was oriented. absolutely nothing wrong with a 20 m dipole simple wire works.
Is that mast just stuck in the snow? What an amazing view and an impressive amount of hear to haul up to the summit!
I watched the first 1/2 of the video. Stopped when I fail to catch the ops callsign. After multiple contacts. YMMV