Video reviews do NOT count toward your ranking.
Video reviews can improve your reviews, causing you to get higher ratings, which will improve your rank.
They can cause more people to look at, and hence vote on or comment on, your reviews, which will improve your ranking.
They earn you points.
But since not everyone is able to do them it is unfair to include them in the rank calculations. It would create an unfair advantage for some and the rank system is based only upon things anyone can do.