other than my recording software, it would be a presentation tool, like Powerpoint (Windows) or Keynote (Mac).

Why? Because that tool can take images, graphics, and text and create a simple presentation. The presentation can be augmented with sound (i.e., your track) and then converted to a file for uploading to the video sites.

Further, the presentation can be converted to a PDF file, which makes it perfect for distribution to fans, bar owners, managers, and other people who need info about the band.