User blog comment:KaiserLos24/Hold on to your buffs - Riot's new teaser trailer/@comment-4022742-20150525182941

I'd just like to note that the mana and health potion are backwards in the video as opposed to in game.

That being said. I doubt it's a hint at a VU, simply due to a visual rework of the pirate having nothing to do with buffs or shops whatsoever, making it quite an obscure vine to put out. A VU or GU seems more likely a hint due to the trembling in the vid.

It could also be none of the above and refer to something completely abstract as something like not being able to respawn with your buffs while dying to jungle monsters.