The Mr. Trololo video is sweeping the inter tubes and should be watched if you haven’t already seen it. According to Pravda, yes that newspaper, this is a video of the Soviet era performer Eduard Khil singing “I Am So Happy to Finally Be Back Home” . Khil, interviewed in the Christian Science Monitor, said:
On the phone, he explained that the reason the iconic song has no lyrics is that the original ones, about a cowboy riding the range while his wife sits at home knitting socks, were banned as “too naughty” by Soviet censors of the day.
“A theme like that was unacceptable, so we decided to sing it without any words at all,” he said. “So, in this case, I was an instrument rather than a singer.”