Its the intro to her vlog and while the battery fills up, it appears it's her vlog super fast and backward, so it looks like it's meant to come across as her day starting at 100% then goes down to zero.Thank you - hard to tell without context. Maybe when it's nearly full it means 19% left to charge? Or does she mean how much battery SHE has left?
The fact it says 0% at the start of the actual vlogging "content" makes no sense to a full battery icon to me, but it could just be a me thing. Either way, she must have some someone else do that because it's too creative to have come out of her brain.