"in general, the cruising speed of a 737 is around 500-600 mph (800-970 km/h)."
Hurricane force wind is 74 mph (119 km/h)
An EF-5 tornado (top of the scale) is any with wind speeds of over 200 mph (322 km/h).
Here's a quote I found about a tornado (unknown rating):
"I've seen bits of straw embedded in telephone poles. Like all the way through. Something as flimsy as a piece of dried grass hurled with enough force to pierce through wood and come out the other side"
The jet is up to three times that speed. That selfie stick would be in multiple pieces in multiple people, pretty much instantly.
He's clearly not driving his plane at 600mph. And there isn't a tornado in the picture so the selfie stick and the hay are fine up there. It's real. Bigfoot, not real. 9/11, real. Vampires, not real. Pokemon, real.
No it is not. That window cannot be opened in flight. It is not locked or anything it is just physically impossible for it to be opened due to pressurized differences.
Kinda looks like there is no window there in the first place, the metal edges are missing. Probably being replaced and the pilot saw his chance to make a funny photo.