Awesome collection video. The pants on the Sittler card were called Cooperalls. The Flyers and the Whalers wore them in the early 1980s. They were essentially track pants, they were incredibly lightweight compared to normal hockey pants so the players wearing them could skate faster than normal. The NHL ended up banning them because the pants didn't create much friction on ice, so when players were knocked down they would end up sliding really hard into the boards. Keep up the great vids!
Those are some really nice cards. Especially the ones with a multi coloured patch. I would choose those ones as personal favourites. As a Minnesota fan, tough choice, but I'd have to go with the patch of Kaprizov, because3 it's a patch. A very nice look into your collection.
