Adobe Captivate is nice for tutorials and all... And you can upload it on youtube easily... try it! : )
Make a movie from your camera, edit it using Sony Vegas Pro / Windows Movie Maker, and then, add some premium sound effects, text maybe, and modify it to give your business look... simple, isn't it ?
For video editing you can use VideoSpin, a very easy to use consumer grade editing software by Pinnacle, a division of Avid (Avid is maker of two top professional softwares for video and sound editing, Avid for picture and ProTools for sound). The best part is that VideoSpin is free. http://videospin.en.softonic.com/ When it comes to using music, you could look into buying some royalty free music. I'd suggest looking into Audiojungle market http://audiojungle.net/category/music There you can find all sorts of music that you can use as much as you want for one time payment of 3-30$ . Cheers