I have always found it amazing when people are able to sing and play at the same time. I can play guitar and I can sing just fine. But doing both at the same time is impossible for me. xD
Warillusen - Wah? What does that have anything to do with this video? This is when Washizaki was a nobody. When he had to work at a convenience store part time to get by. He officially debuted in 2005, so the 2004 ones in the latter half of the video are from before he even had a contract. They make fun of that years later since he still appears every New Years on her radio with a new song every year.