Spotted high on the wall of the local USPS office:
A closer look:
Huh.
The USPS uses VLC. Who knew?
I darken their doorway so infrequently I have no idea what’s normally displayed up there. Surely it shows advertisements for USPS products, which begs the question: why VLC?
The Smell of Molten Projects in the Morning 
It pains me, but: https://en.wikipedia.org/wiki/Begging_the_question
Consider me chastised until the next occurrence!
I’ve noticed VLC as a staple on computers for a while now (at schools, universities, libraries and companies), perhaps because it plays and converts “everything.” So if it’s not merely an accident of my personal observations and the same trend exists in America, the answer could be as simple as because it’s part of the standard image.
Also of course VLC is (supposedly) easy to script.
Also, VLC is free-as-in-beer (plus -as-in-speech, of course), which may explain all the evidence without contradicting any.