Youtube is evil with their blocking. I think I can file some protests and claim fairuse to get the sound going. It's more annoying when I can't tell when the sound is cut out vs putting some ads up. Wish they'd just link the song in the bottom to buy it and be done with it.
For the 4x spear hit, I don't know if it is a bug or property, but spear especially will 'stun' you like that sometimes. This is exacerbated on servers where the swing speed is set to fastest, most weapon's dont do this on medium, and spears probably about 3 max, but on fastest you start to see it a bit more often. At least with the spear is balanced by the fact that it does so little damage 3 hits are about the equivalent of 1 hit with a normal weapon.
Also, some servers break everything, like if you play on gk siege when its tuned up to 80 people, you'll find that the game is a lot less responsive than on smaller population servers. In this case you have to play kind of like you have 100 ping, where you keep a lot of space between you and other players, and keep it very, very simple in how you play, give yourself lots of time to block through the lag and be very sure about your return swings.