Until Vine and later tiktok, basically the whole Internet was in the horizontal format and vertical videos would play with huge black boxes on the left and right and in turn you can’t really make out the details of the videos as well because they were so small on those screens. Today’s internet is very different and has things actually designed for vertical videos so complaining about it makes no sense anymore.
The labels are like a shrink wrap, it makes it look lighter or empty starting at the bottom of the wrap in this picture.