Now that you've aroused our curiosity, how about supplying links to the videos in question, or at least song titles or something we can use to look 'em up? Please?

Every YouTube video comes with a "comments" section. If I were you, I'd post a message there to accompany each performance, identifying yourself as the songwriter.

Since you've quit gigging, you can't make money from this newfound notoriety by promoting your appearances, but maybe you can drum up some CD sales through the YouTube comments section. If you're loath to publish your personal email address to the World Wide Web, maybe you could set yourelf up with CDBaby and post a reference to their page where your recording can be purchased.

However few people actually read the comments, you can be pretty sure that the performers, at least, will check in periodically to see who's saying what about them. Keep them in mind when deciding what to write.