This is a great song known as the "Trolololo" video. Some of the lyrics include "trololololololololololololololololololol ololololol olololololololololololololololololololol ololololol ololololololololo," "dohdohdohhhhhh ohohohohohooh" and "yeyeyeyeyeyeyeyeyeyeye." If you want an explanation of this video there is one here.
