There's a lot of useful feedback in this thread that helps us to identify the problems. There are a lot of valid points in this thread, pointing out things like speed not being a factor in this video. However for better or worse, short videos like this that help to highlight the balance arguments and counter-arguments are invaluable to us for identifying your concerns. So thank you.
There is one vein in this thread I feel compelled to dispel. Some players have expressed concern over a rumour of a 'shadow nerf' to the silverhand. Know that this is expressly false. It is never our intention to make balance changes without adding them to the patch notes. If a value was changed without a patch note, then its a bug, or we goofed (which can happen).
I investigated on our end. There has been no change to the health or armour values of the Silverhand in at least 3 months. So if there was a nerf, it was indirect. Perhaps, for example, the damage of the weapons you're using to test the Silverhand's health were changed at some point.