In real-time, it looks like a dirty play, but when slowed down, it almost seems like Kassian loses his balance a bit as well. Landeskog was given a two-minute minor for holding on the play.
The second one was a hit by Nathan MacKinnon on Zach Hyman in open-ice. This one appears to be more vicious as MacKinnon extends his leg and catches Hyman with a knee-on-knee: