Praise God @flauwy!
This is by far the best tip I've received all day regarding this decrease in value. You might want to turn this reassuring info into an original post. It's a question many newbie Steemians find themselves angsting over.
Many thanks!
Peace.
Do you mean like text based post instead of a video?
I'm thinking a text-based or video specifically dispelling the MYTH and mystery of why hitting the upvote button sometimes causes the value to decrease.
I found your answer quite informative; and surmise that it would be helpful for many who have this question.
Peace.