Hi,
FYI, I'm OK and hope you will excuse my not submitting anything for so long. I'm President of my Golf Club, and also belong to my Kiwanis Club all of which take up a lot of time since 2004.
The videos you saw were taken by Phil Hall, a member of a group up to 5 Yamaha KB players who chat together nightly with each other. We had a reunion in Florida last April; and you can see it was a real blast in the video. Members at the reunion came from California, Oklahoma, Georgia, and England.
I like to do MP3 Vocals, using the Vocal Harmonizer, with a lot of my music; and I have a vocal you can listen to at the "PSR Tutorial Site". It's a Jim Reeves song entitled "Four Walls". If you go to my page (Del Kay) there, just click on the title of the "Four Walls" MP3 and give it a listen at your leisure.
Go to: "http://psrtutorial.com/P/Kay.html"
If you have a Yamaha KB, I also have a lot of midifiles there which can be downloaded and played on your Yamaha KB's.
I only play by ear; but they don't sound too bad; and I hope you like some of them.
Thanks Taike for the nice comments on the video. It's hard not to smile watching it.
Best regards,
Del