I love recorded webinars because since it's pre-recorded, I am free to engage with the audience DURING the webinar. This makes a huge impact on the audience because I can give them specialized advice and better explain the points in the webinar, live as it is happening. The last client I did this for, the webinar had a 100% approval rating (the first for the client's webinar series) and I got multiple testimonials. Of course you want to include your contact information but if you can go above and beyond and give the audience specialized attention it really makes an impact.