Larry ... You want to show prospective clients what they are getting and you showed that ...
However, you said you wanted to market to "public libraries and park districts".
I think you may find an audience of a wider age group in those venues. That being the case, the only suggestion I might make is to have one video made up of clips from perhaps three different songs that might show your versatility, and the scope of the songs you can perform ... While 'everyone' knows "The Saints", you might want to include some songs such as "Sweet Caroline" and songs by the Beatles/Beach Boys/Elvis ...
JMHO

Best of luck ...