Apparently it's become a YouTube sensation to do this now. A search for "100 button" or "100 " will turn up more results--here's a sampling:

https://www.youtube.com/watch?v=5A413VGC_HE
https://www.youtube.com/watch?v=oTMr-r93Gbo
https://www.youtube.com/watch?v=wWfqjyuaEMg
https://www.youtube.com/watch?v=CO8IJOcQtv4
https://www.youtube.com/watch?v=Gc2Id_7oWAs
https://www.youtube.com/watch?v=pF2lkwGi47M
https://www.youtube.com/watch?v=tDUlgxPj4D0
https://www.youtube.com/watch?v=rgFqmmgWGZQ
https://www.youtube.com/watch?v=-zoSuz3fcvM

The second search term didn't show up (I guess b/c the site doesn't support Cyrillic )

It's the Russian word for button (looks like KHONKA)