I am aiming to finish and release build 5 next weekend, and there will be a big dinosaur, the Allosaurus to hunt. There will also be a little zoo level for looking at the dinosaurs as I added them. I am taking steps to optimize a fair bit of the graphics, so hopefully performance will be better. Along will a bunch of new weapons I also reworked the projectile physics, so the bow/rpg will be easier to use.
I am not entirely sure, but I think your video demonstrated a bug. The player has two parts, a floating camera with the gun/weapon, and an invisible character controller capsule for movement/collision. It is possible that the two player components got apart such that your last shot at the raptor might have hit the character controller capsule, thus instantly killing you. It takes about 3-4 seconds for the raptor to kill the player.