I did it in Boro Park this year, at like 11PM when the chickens had already been sitting all day.
My chicken seemed just fine, not dead at all. It squawked at me and fought go get loose like a right spring chicken.
I saw two dead chickens in a box, which does not seem too bad considering they must have done a couple thousand that day.
The tayna on the crates is ridiculous--they are supposed to be shipped in those crates. You think the kaparros people invented the crates? It's just the same crates every shipper ships chickens in.
And when I watch that video, especially with the yarlmulked sheigetz being the mekatreig, it reminds me very well of
Lukumi Babalu Aye (which was similarly the high class Cuban immigrants trying to shut down the superstitions of the low class immigrants who practiced Santeria)