Elemental sundering explanation video vs actual skill

I'm not sure if this is a bug or not but when you look at the elemental sundering spear skill in the gem crafting tab video, the skill in the tutorial is very different from the actual skill.
In the video, it detonates the explosion instantly.
When you actually use the skill, there is a substantial delay before the explosion.
I wish the one in the video is how it is supposed to work but I assume that it is the other way around.
Anyhow, this should be addressed and edited to display the same skill as you actually get.
Best regards