Sending a video clip to your client before your speaking engagement or performance is a great way to get Internet visibility. Plus, if the clip is good (and it should be) more than likely your client will leave it on their website after your event. Ask if they can also add a link back to your website.
This will also help build your Wikipedia credentials.
Primeau Productions, Inc client Juliet Funt recently sent a clip to one of her upcoming engagements. www.JulietFunt.com