Hey Taha this is old Tradition in germany. ! its not trolololo Well post some vids of your country i think they are enough trolololo's 
ik its yodeling jesus ...
and its not only in germany its all over the world
aussies , americans , swiss , liechtenchtein people too
It comes from a region in the alps moutains therefore its either switzerland or lechtenstein
even the word is from an austro-bavarian language
and u r from nordrhein-westfalen which far from the alps
so dont get to offended bro
p.s: and ye trololo song the original song is from a russian guy so why dont they get mad over it ...
p.s.s: and ye if u would say the title states its german i would say german is a language b4 being a nationality its spoken in many countries such as luxembourg , liechtnstein , austria , switzerland , poland , vatican ( to speak to the SWISS guard ) belgium etc ...