"Right On The Tip Of My Tongue" was written by Van McCoy, famous for the disco hit "The Hustle". Brenda & The Tabulations, the group who sang the song, was one of those 70s groups that makes you slap your knee and go, "Remember that group?" Of course, I do.
NOTE: I've uploaded more than 160 videos to YouTube so far and have noticed a lot of subtle changes lately. This particular video, in its default low-res mode, looks sharper to me. The YouTube team apparently is continuing to improve the conversion quality.
UPDATE 4/7/08: an experimental slide show of photos taken from the video: