I think the very first step would be having an idea for whole project - webinar. Think like director. Also I might think of Steve Jobs' presentations. Every second and detail of it was directed.
If you’re still looking for this specific ‘soundtrack’ I am open for collaboration. Please feel free to contact me directly at firstname.lastname@example.org or have a listen to my portfolio: http://audiojungle.net/user/mirocomposer/portfolio
Have a nice day! Miro